WO2020227919A1 - 一种交叉耦合滤波器 - Google Patents

一种交叉耦合滤波器 Download PDF

Info

Publication number
WO2020227919A1
WO2020227919A1 PCT/CN2019/086796 CN2019086796W WO2020227919A1 WO 2020227919 A1 WO2020227919 A1 WO 2020227919A1 CN 2019086796 W CN2019086796 W CN 2019086796W WO 2020227919 A1 WO2020227919 A1 WO 2020227919A1
Authority
WO
WIPO (PCT)
Prior art keywords
resonator
coupling
resonant
resonators
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/086796
Other languages
English (en)
French (fr)
Inventor
李敦穁
罗仁虎
尹泽
李强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rosenberger Technology Kunshan Co Ltd
Original Assignee
Rosenberger Technology Kunshan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rosenberger Technology Kunshan Co Ltd filed Critical Rosenberger Technology Kunshan Co Ltd
Priority to PCT/CN2019/086796 priority Critical patent/WO2020227919A1/zh
Priority to EP19928759.0A priority patent/EP3972047A4/en
Publication of WO2020227919A1 publication Critical patent/WO2020227919A1/zh
Priority to US17/523,449 priority patent/US11799181B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
    • H01P1/2086—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators multimode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure

Definitions

  • the present invention relates to a filter, in particular to a cross-coupling filter.
  • the recent demand trend for filters is miniaturization and high quality requirements.
  • the communication components used in small base stations for 5G communications are smaller in size and more demanded than previous macro base station products. Therefore, the components used in the product must also be high-quality miniaturized, lightweight, and have a structure suitable for mass production.
  • the filters used in small base stations are usually dielectric waveguide filters and traditional metal coaxial filters.
  • the dielectric waveguide filter can be miniaturized and lightweight, and has a low manufacturing cost, but it has worse loss and harmonic characteristics than a metal coaxial filter.
  • the traditional metal coaxial filter has better loss and harmonic characteristics than the dielectric waveguide filter, but the reduction in size and weight in the design characteristics has reached a certain limit, and the number of internal components has also reached the limit, which cannot be reduced. The purpose of the cost.
  • the patent application number: CN201710149229.5 discloses a filter with a frame structure.
  • the two sides of the square frame are open structures, and the partition wall divides the inside of the frame into two spaces.
  • the partition wall divides the inside of the frame into two spaces.
  • vertical to this partition wall there is an integrated resonator.
  • the resonator is bent into an L-shape or a T-shape to reduce the space requirement, but such a form still has limitations on the miniaturization of the filter volume, and it is difficult to meet the design requirements of the small size of the filter.
  • sheet or wire conductors are added in the form of open circuit or short circuit between non-adjacent resonators. Insulators need to be fixed to the frame or conductors in the form of wires are welded to the resonators. Such a structure will incur processing costs and processing tolerances, and when the frame and the resonator are integrated, the frequency drift of the filter with the ambient temperature is large.
  • the purpose of the present invention is to overcome the defects of the prior art and provide a cross-coupling filter.
  • a cross-coupling filter including a resonant structure
  • the resonant structure includes multiple rows of resonant units, each row of resonant units includes at least two resonators, and adjacent to the same row
  • the two resonators are mainly electrically coupled or magnetically coupled, and multiple groups of adjacent resonators in the same row are alternately electrically coupled, magnetically coupled, or magnetically coupled, and electrically coupled.
  • the coupling formed between two adjacent resonators of two adjacent rows of resonant units is mainly electrical or magnetic coupling, and multiple groups of adjacent resonators of two adjacent rows of resonant units are electrically coupled
  • the main coupling, the main magnetic coupling or the main magnetic coupling, and the main electric coupling are coupled in a form of alternating phases, and at least one set of cross coupling is formed.
  • the resonant structure is integrally formed, the resonant structure further includes a frame, and the resonant unit is integrally formed on the frame.
  • each of the resonators has a cylindrical structure as a whole, and includes opposite resonant heads and resonant tails, and the width of the resonant heads is greater than the width of the resonant tails.
  • the filter further includes a cover plate disposed on the resonator, the cover plate includes an upper cover plate and a lower cover plate respectively disposed on the upper and lower end surfaces of the resonance structure to form a closed filter cavity .
  • the upper cover plate and/or the lower cover plate includes a plurality of protrusions and at least one shielding column, wherein:
  • the protruding part extends from the end face of the cover plate close to the resonant structure in a direction approaching the resonant structure, and the arrangement position of the protruding part on the cover plate corresponds to the position of the resonator head of the resonator on the resonant structure;
  • the shielding column is located between two adjacent resonators.
  • the upper cover plate or the lower cover plate further includes at least one connecting column, and the connecting column is arranged between two adjacent resonators in the same row and connected to the upper and lower cover plates.
  • the resonant tails of two adjacent resonators in the same row are connected to form the main magnetic coupling, or the resonant heads are opposite to form the main electrical coupling, and multiple groups of adjacent resonators in the same row are resonant heads
  • the structure distribution of the resonators facing each other, the resonant tails are connected or the resonant tails are connected, and the resonant heads are relatively alternating, so that multiple groups of adjacent resonators in the same row are mainly electrically coupled, magnetically coupled or magnetically coupled, and electrically coupled as Main alternate form coupling.
  • At least one partition wall is provided between the resonant units in two adjacent rows, and the partition wall makes the coupling formed between two adjacent resonators of the resonant units in two adjacent rows be mainly electrical coupling or magnetic coupling Mainly.
  • the cross-coupling filter further includes at least one structural member for enhancing the amount of cross-coupling between the resonators, and the structural member is connected to form the cross-coupled resonators.
  • the cover plate further includes a plurality of tuning screws and a plurality of coupling tuning screws
  • the resonant head is provided with tuning holes
  • the tuning screws pass through the cover plate and can extend into the corresponding resonant head.
  • the tuning hole is used to adjust the resonant frequency of the resonator; the coupling adjusting screw penetrates the cover plate and extends between two adjacent resonators to adjust the coupling amount between the resonators.
  • the multiple rows of resonant units are distributed along a signal transmission path, and the signal transmission path is a U-shaped or S-shaped or a curved path formed by a plurality of continuous U-shaped or continuous S-shaped.
  • the filter further includes a signal input port and a signal output port respectively provided at the two ends of the signal transmission path.
  • the filter is a resonator filter of order 4 or higher.
  • the resonant structure of the filter adopts an integrated frame structure, which is simple to assemble, has good assembly tolerance consistency, and can maintain stable product quality.
  • Figure 1 is a schematic diagram of the split structure of embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of the structure of the resonant structure of Embodiment 1 of the present invention.
  • Embodiment 3 is a simulation waveform diagram of Embodiment 1 of the present invention.
  • Embodiment 4 is a schematic diagram of the split structure of Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of the structure of the resonant structure of Embodiment 2 of the present invention.
  • Figure 6 is a simulation waveform diagram of Embodiment 2 of the present invention.
  • Embodiment 7 is a schematic diagram of the split structure of Embodiment 3 of the present invention.
  • FIG. 8 is a schematic structural diagram of a resonant structure of Embodiment 3 of the present invention.
  • Figure 9 is a simulation waveform diagram of Embodiment 3 of the present invention.
  • FIG. 10 is a schematic diagram of the split structure of Embodiment 4 of the present invention.
  • FIG. 11 is a schematic diagram of the structure of the resonant structure of Embodiment 4 of the present invention.
  • Figure 12 is a simulation waveform diagram of Embodiment 4 of the present invention.
  • FIG. 13 is a schematic diagram of a split structure of an alternative solution of Embodiment 4 of the present invention.
  • FIG. 14 is a schematic structural diagram of a resonant structure of an alternative scheme of Embodiment 4 of the present invention.
  • Embodiment 15 is a schematic diagram of the split structure of Embodiment 5 of the present invention.
  • FIG. 16 is a schematic diagram of the structure of the resonant structure of Embodiment 5 of the present invention.
  • Figure 17 is a simulation waveform diagram of Embodiment 5 of the present invention.
  • FIG. 19 is a schematic structural diagram of a resonant structure of an alternative scheme of Embodiment 5 of the present invention.
  • FIG. 21 is a schematic diagram of the structure of the resonant structure of Embodiment 6 of the present invention.
  • Figure 22 is a simulation waveform diagram of Embodiment 6 of the present invention.
  • FIG. 23 is a schematic diagram of a split structure of an alternative solution of Embodiment 6 of the present invention.
  • FIG. 24 is a schematic structural diagram of a resonant structure of an alternative solution of Embodiment 6 of the present invention.
  • FIG. 25 is a schematic structural diagram of a resonant structure of another alternative solution of Embodiment 6 of the present invention.
  • FIG. 26 is a schematic diagram of the split structure of another alternative solution of Embodiment 6 of the present invention.
  • Resonant structure 11, frame, 12, resonator, 121, resonant head, 122, resonant middle, 123, resonant tail, 124, tuning hole, 2, upper cover, 3, lower cover, 4.
  • signal Input port 5, signal output port, 6, partition wall, S1, transmission loss waveform, S2, return loss waveform.
  • the cross-coupling filter disclosed in the present invention includes a resonant structure 1, an upper cover plate 2, a lower cover plate 3, a signal input port 4, and a signal output port 5.
  • the frame integrated structure includes a frame 11 and multiple rows of resonant units integrally formed in the frame 11, and each row of resonant units further includes at least two resonators 12.
  • the frame-integrated resonant structure 1 has the advantages of simple assembly, good assembly tolerance consistency, and stable product quality, so it is suitable for mass production.
  • the resonant structure 1 and the upper cover 2 or the lower cover 3 can be detachably installed between the resonant structure 1 and the upper cover plate 2 or the lower cover plate 3 through a fixing structure (such as screws, not shown), which includes multiple rows of resonant units, that is, does not include the frame 11.
  • a fixing structure such as screws, not shown
  • the resonant structure 1 and the upper cover plate 2 or the lower cover plate 3 are provided with fixing holes (not shown in the figure), and the screws pass through the corresponding fixing holes to fix the resonant structure 1 and the upper cover plate 2 or the lower cover plate 3 .
  • Multiple rows of resonant units extend and distribute in the frame 11 along one side wall of the frame 11 to the other side wall opposite to the side wall, such as distributed along the front and back directions where the front and rear side walls of the frame 11 are located, or the left side of the frame 11 , Distributed in the left and right directions where the right wall is located, and are located on the same plane.
  • each resonator 12 has a cylindrical structure as a whole, and specifically includes a resonant head 121, a resonant middle portion 122, and a resonant tail 123.
  • the resonant head 121 is electrically coupled to the resonator 12.
  • the main strength is the strongest.
  • the resonant tail 123 is the strongest magnetic coupling of the resonator 12.
  • the width of the resonant head 121 is designed to be wider than the width of the resonant middle portion 122 and the resonant tail portion 123, so that the volume of the resonator 12 can be further reduced under the requirement of the same frequency.
  • the resonant head 121 is provided with a tuning hole 124 penetrating through the upper and lower end surfaces thereof for adjusting the resonant frequency of the resonator 12.
  • the resonator structure with multiple bent portions is also applicable to the present invention.
  • the multiple rows of resonators 12 are arranged in the frame 11 along a signal transmission path, the signal transmission path may be U-shaped or S-shaped, or a curved path formed by a plurality of continuous U-shaped or S-shaped.
  • the coupling mode of two adjacent resonators 12 on the signal transmission path is determined by their shapes and mutual arrangement positions. What needs to be explained is that the general TEM (transverse electromagnetic mode, transverse electromagnetic wave mode) mode filter is mainly electrically coupled and magnetically coupled coexisting, the one with the larger amount of coupling is called dominant coupling.
  • the dominant coupling mode in the filter of the present invention can be determined by the arrangement position of the two coupled resonators.
  • the main coupling is electrical coupling. If the coupling between the two is mainly produced by the resonant tail, the main coupling is magnetic coupling. There is not much difference between the electrical coupling-based quantity and the magnetic coupling-based quantity, which is electromagnetic hybrid coupling.
  • two adjacent resonators 12 in the same row are mainly electrically coupled or magnetically coupled, that is, the coupling between two adjacent resonators 12 is mainly determined by the resonant head 121 or resonant tail 123, specifically, the two resonant heads 121 of two adjacent resonators 12 in the same row are arranged opposite to each other to form electrical coupling, or two resonant tails 123 are connected to form a magnetic coupling Mainly.
  • the arrangement of the resonators 12 in the same row is not limited to the one introduced here, as long as it can be realized that two adjacent resonators 12 can form an arrangement based on electrical coupling or magnetic coupling. All are within the protection scope of the present invention.
  • the resonators 12 in the same row form a group of adjacent resonators 12 or multiple groups of adjacent resonators 12, where, when a group of adjacent resonators 12 are formed (that is, there are two resonators 12 in a row), this group
  • the resonators 12, that is, the resonant head 121 are opposed to each other, forming a main electrical coupling, or two resonant tails 123 are connected, forming a main magnetic coupling.
  • these multiple sets of adjacent resonators 12 are mainly electrically coupled, magnetically coupled or magnetically coupled, and electrically coupled as The main phase is alternately coupled.
  • multiple groups of adjacent resonators 12 in the same row are distributed in a structure in which the resonant heads 121 are opposed to each other and the resonant tails 123 are connected alternately.
  • a group of adjacent resonators 12 are distributed in a structure in which resonance tails 123 are connected; or a structure in which resonance tails 123 are connected and resonance heads 121 are relatively alternating.
  • Two adjacent resonators 12 in two adjacent rows are mainly electrically coupled or magnetically coupled.
  • the positions of two adjacent resonators 12 in two adjacent rows are set correspondingly.
  • Two adjacent resonators 12 in two adjacent rows are arranged in parallel or approximately parallel, and the orientation of the resonant head 121 or the resonant tail 123 of the two is the same, for example, the two resonant heads 121 both face forward or both face Then, and the positions of the two resonant heads 121 correspond, and the positions of the two resonant tails 123 also correspond.
  • At least one partition wall is arranged between the resonant units in two adjacent rows, and these partition walls make the coupling formed between two adjacent resonators of the resonant units in two adjacent rows be mainly electrical coupling or magnetic coupling.
  • the position of the partition wall between the two resonators can realize that the two resonators are mainly electrically coupled or magnetically coupled, which is not limited in the present invention.
  • the partition wall can be arranged on the frame, or and/or on the cover plate.
  • the multiple groups of adjacent resonators 12 in two adjacent rows are mainly electrically coupled, magnetically coupled, or magnetically coupled, and electrically coupled in an alternate manner, that is, a group of adjacent resonators in different rows
  • the coupling mode of 12 is mainly electrical coupling
  • the coupling mode of the adjacent group or two groups of adjacent resonators 12 is mainly magnetic coupling.
  • at least one set of cross-coupling is formed in the multiple sets of adjacent resonators 12 in two adjacent rows. The cross-coupling generates a transmission zero point around the bandwidth. According to the number of resonators 12, the number of cross-couplings can be increased to increase The number of zeros.
  • cross-coupling between the resonators 12 of the present invention does not require additional structural components, but additional structural components (such as metal rods, insulators, etc.) can be added between adjacent two resonators 12 that form cross-coupling according to the situation. Not shown) to further increase the amount of cross-coupling.
  • additional structural components such as metal rods, insulators, etc.
  • the upper cover plate 2 and the lower cover plate 3 are respectively covered on the upper end surface and the lower end surface of the resonance structure 1 to form a closed filter cavity.
  • the cover (upper cover and/or lower cover) can be provided with a plurality of protrusions (not shown) and at least one shielding column (not shown) ) And at least one connecting post (not shown), wherein the protrusion extends from the end of the cover plate close to the resonant structure toward the direction close to the resonator structure 1, and the arrangement position of the protrusion part on the cover plate and the resonator
  • the position of the resonant head 121 of 12 corresponds to the position of the resonant head 121 of the resonator 12, which will shorten the distance between the cover plate and the resonant head 121 of the resonator 12, because the closer to the resonator 12, the larger the distributed capacitance and the lower the resonant frequency
  • the shielding column is arranged between two adjacent resonators 12 to adjust the coupling strength between the two resonators 12, and the shielding column forms the aforementioned partition wall in the cover plate.
  • the coupling strength between the resonators 12 can be adjusted by the spacing between the resonators 12, this method may increase the size of the filter, and a shielding column is provided to adjust the coupling strength between the resonators 12 It does not affect the filter volume.
  • the connecting column is arranged between two adjacent resonators 12 in the same row, and connects the upper and lower cover plates 2 and 3.
  • the setting of the connecting column can improve the harmonic characteristics of the filter.
  • the connecting column is implemented, it is set on the upper cover or the lower cover.
  • a plurality of tuning screws passing through the upper cover 2 and extending into the tuning hole 124 of the resonator at the lower end can be provided on the upper cover 2 to adjust the resonant frequency of the resonator 12; And through the upper cover plate 2 and the lower end extends into the coupling adjustment screw between two adjacent resonators 12 (not shown in the figure) for adjusting the coupling amount between the resonators 12.
  • the structure of the other cover plate can be simplified, such as reducing the thickness, and not providing the above-mentioned protrusions, partition walls, connecting posts, etc., so that The overall thickness and volume of the filter are reduced.
  • the signal input port 4 and the signal output port 5 are respectively arranged at the two ends of the above-mentioned signal transmission path. According to the difference of the signal transmission path, the setting positions thereof may be different accordingly.
  • a cross-coupled filter according to Embodiment 1 of the present invention includes a resonant structure 1, an upper cover plate 2, a lower cover plate 3, a signal input port 4, and a signal output port 5.
  • the structures of the cover plate 2, the lower cover plate 3, the signal input port 4, and the signal output port 5 can be referred to the above description, which will not be repeated here, and the structure of the lower resonant structure 1 is mainly introduced.
  • the filter formed by the resonant structure 1 of Embodiment 1 of the present invention is a fourth-order filter, which includes a frame 11 and two rows of resonant units integrally formed in the frame 11, and each row of resonant units includes two resonators.
  • the four resonators are defined as resonator 12a, resonator 12b...resonator 12d, where resonator 12a, resonator 12b are in a row , The resonator 12c and the resonator 12d are in a row.
  • the structure of each resonator is as described above and will not be repeated here.
  • the two rows of resonators 12 are distributed in the frame along the left and right directions where the left and right walls of the frame are located. And the four resonators are arranged in a U-shaped signal transmission path within the frame. Specifically, the signal is input from the resonator 12a, and after passing through the resonator 12b and the resonator 12c in turn, the signal is finally output from the resonator 12d.
  • the signal input port of Embodiment 1 is electrically connected to the resonator 12a, and the signal output port is electrically connected to the resonator 12d.
  • the resonator 12a and the resonator 12b in the same row, the resonator 12c and the resonator 12d are mainly magnetically coupled, and the resonator 12b and the resonator 12c in different rows are mainly electrically coupled, and the resonators 12b and 12c in different rows are mainly electrically coupled.
  • the cross-coupling (defined as the first cross-coupling) generated between the resonator 12a and the resonator 12d is the main component of the magnetic coupling, which is opposite to the main component of the electrical coupling between the resonator 12b and the resonator 12c.
  • the main electrical coupling and the main magnetic coupling are formed respectively, that is, the alternating coupling of the main electrical coupling and the main magnetic coupling is formed.
  • the first cross-coupling is opposite to the coupling form of the two-stage resonators (that is, the resonator 12b and the resonator 12c) after the first cross-coupling.
  • This embodiment 1 forms one cross-coupling, and each cross-coupling respectively generates a transmission zero point around the bandwidth, thereby generating a total of two transmission zero points, as shown in FIG. 3.
  • the resonant tails of the resonator 12a and the resonator 12b are connected and integrally formed with the left side wall of the frame to form a main magnetic coupling.
  • the resonant heads respectively face the rear and front side walls of the frame and are connected to the rear The side walls and the front side walls are not in contact; similarly, the resonator tails of the resonator 12c and the resonator 12d are connected and integrally formed with the right side wall of the frame to form a magnetic coupling, and the resonant heads are each facing the rear side of the frame The wall and the front side wall are not in contact with the rear side wall and the front side wall.
  • a partition wall is arranged between the resonator 12b and the resonator 12c, and the partition wall allows the resonator 12b and the resonator 12c to form a main electrical coupling; a partition wall is arranged between the resonator 12a and the resonator 12d, and the partition wall
  • the partition wall mainly forms a magnetic coupling between the resonator 12a and the resonator 12d.
  • the magnetic coupling between the resonators 12b and 12c in different rows can also be the main magnetic coupling.
  • the first cross coupling between the resonators 12a and the resonators 12d in the different rows is electrical coupling.
  • it is opposite to the main component of the magnetic coupling between the resonator 12b and the resonator 12c. That is, between the resonator 12b and the resonator 12c, and between the resonator 12a and the resonator 12d, the main magnetic coupling and the main electric coupling are formed respectively, that is, the main magnetic coupling and the main electric coupling are alternately coupled.
  • a cross-coupling filter according to Embodiment 2 of the present invention includes a resonant structure 1, an upper cover plate 2, a lower cover plate 3, a signal input port 4, and a signal output port 5.
  • the filter formed by the resonant structure of the second embodiment of the invention is also a fourth-order filter.
  • the difference from the first embodiment is that, as shown in FIG. 5, the resonator 12a and the resonator 12b in the same row are between the resonator 12c and the resonator.
  • the main electrical coupling is between the resonators 12d, the main magnetic coupling between the resonators 12b and 12c in different rows, the cross-coupling between the resonators 12a and the resonators 12d in different rows (defined as the first cross Coupling) is mainly electrical coupling, which is opposite to the main component of magnetic coupling between resonator 12b and resonator 12c. That is, between the resonator 12b and the resonator 12c, and between the resonator 12a and the resonator 12d, the main magnetic coupling and the main electric coupling are formed respectively, that is, the main magnetic coupling and the main electric coupling are alternately coupled.
  • one cross-coupling is formed, and each cross-coupling respectively generates a transmission zero point around the bandwidth, thereby generating a total of two transmission zero points, as shown in FIG. 6.
  • the resonant tail of the resonator 12a is integrally formed with the rear side wall of the frame, and the resonant head and the resonant head of the resonator 12b are opposed to each other with a coupling gap formed between them, forming the main electrical coupling, and the resonance of the resonator 12b
  • the tail part is integrally formed with the front side wall of the frame; similarly, the resonant tail part of the resonator 12c is integrally formed with the rear side wall of the frame, and the resonant head and the resonant head of the resonator 12d are arranged oppositely and a coupling gap is formed between them to form an electric
  • the main coupling is the resonant tail of the resonator 12d and the front side wall of the frame are integrally formed.
  • a partition wall is arranged between the resonator 12b and the resonator 12c, and the partition wall is arranged in the lower cover plate 3.
  • the partition wall makes the resonator 12b and the resonator 12c form a main magnetic coupling; the resonator 12a and the resonance
  • a partition wall is arranged between the resonators 12d, the partition wall is arranged on the frame, and the resonator 12a and the resonator 12d are mainly electrically coupled.
  • the resonator 12b and the resonator 12c in different rows can also be electrically coupled.
  • the first cross coupling between the resonators 12a and the resonator 12d in the different rows is magnetic.
  • the main coupling is opposite to the main component of the electrical coupling between the resonator 12b and the resonator 12c. That is to say, between the resonator 12b and the resonator 12c, and between the resonator 12a and the resonator 12d, the main electrical coupling and the magnetic coupling are formed respectively, that is, the main electrical coupling and the main magnetic coupling are formed. Alternate coupling.
  • a cross-coupled filter according to Embodiment 3 of the present invention includes a resonant structure 1, an upper cover plate 2, a lower cover plate 3, a signal input port 4, and a signal output port 5.
  • the structures of the cover plate 2, the lower cover plate 3, the signal input port 4, and the signal output port 5 can be referred to the above description, which will not be repeated here, and the structure of the lower resonant structure 1 is mainly introduced.
  • the filter formed by the resonant structure 1 of Embodiment 1 of the present invention is a sixth-order filter, which includes a frame 11 and two rows of resonant units integrally formed in the frame 11, and each row of resonant units includes 3 resonators.
  • the six resonators are defined as resonators 12a, 12b...resonators 12f, where resonators 12a to 12c are in a row.
  • the resonators 12d to 12f are in a row.
  • the structure of each resonator is as described above and will not be repeated here.
  • the two rows of resonators 12 are distributed in the frame along the left and right directions where the left and right walls of the frame are located. And the six resonators are arranged in the frame according to the U-shaped signal transmission path. Specifically, the signal is input from the resonator 12a, after passing through the resonator 12b to the resonator 12e, and finally output from the resonator 12f, that is to say, The signal input port of Embodiment 1 is electrically connected to the resonator 12a, and the signal output port is electrically connected to the resonator 12f.
  • the resonator 12a and the resonator 12b in the same row are mainly magnetically coupled, and the resonator 12b and the resonator 12c are mainly electrically coupled, which means that multiple groups of adjacent resonators in the same row are magnetically coupled.
  • the main and electric coupling are alternately coupled; similarly, the resonator 12d and the resonator 12e in the same row are mainly electrically coupled, and the resonator 12e and the resonator 12f are mainly magnetically coupled.
  • the resonator 12c and the resonator 12d in different rows are mainly magnetically coupled, and the cross-coupling (defined as the first cross-coupling) between the resonators 12b and 12e in the different rows is mainly electrical coupling, and the resonance
  • the main component of the magnetic coupling between the resonator 12c and the resonator 12d is opposite, and the cross-coupling (defined as the second cross-coupling) between the resonators 12a and 12f in different rows is the main magnetic coupling, which is different from the resonator 12b and the resonator.
  • the electrical coupling between 12e is opposite to the main components, that is to say, the magnetic coupling between the resonator 12c and the resonator 12d, the resonator 12b and the resonator 12e, and the resonator 12a and 12f respectively form the main and electrical couplings.
  • Main coupling and main magnetic coupling that is, alternating coupling of main magnetic coupling and main electric coupling.
  • the first cross-coupling is opposite to that of the two-stage resonators (ie, the resonator 12c and the resonator 12d) after the first cross-coupling
  • the second cross-coupling is opposite to the first cross-coupling.
  • two cross-couplings are formed, and each cross-coupling respectively generates a transmission zero point around the bandwidth, thereby generating a total of four transmission zero points, as shown in FIG. 9.
  • the resonant tails of the resonator 12a and the resonator 12b are connected and integrally formed with the left side wall of the frame to form a magnetic coupling, while the resonant head faces the opposite direction.
  • the resonant head of the resonator 12a faces the frame On the rear side wall, the resonant head of the resonator 12b is opposite to the resonant head of the resonator 12c, forming a main electrical coupling.
  • the resonant tail of the resonator 12c is integrally formed with the front side wall of the frame; the resonator 12d in the other row
  • the distribution structure of the resonator 12e and the resonator 12f is the same as the distribution structure of the resonator 12a, the resonator 12b, and the resonator 12c, and will not be repeated here.
  • a partition wall is arranged between the resonator 12c and the resonator 12d, and the partition wall is arranged on the lower cover 3, so that the magnetic coupling between the resonator 12c and the resonator 12d is mainly formed; the resonator 12b and the resonator 12e A partition wall is arranged between the resonator 12b and the resonator 12e to form electrical coupling; a partition wall is arranged between the resonator 12a and the resonator 12f, and the partition wall makes the resonator 12b and the resonator 12e The magnetic coupling is mainly formed.
  • the electrical coupling between the resonators 12c and the resonators 12d in different rows can also be mainly electrical coupling.
  • the first cross-coupling between the resonators 12b and the resonators 12e in the different rows is the magnetic coupling.
  • the second cross-coupling between the resonators 12a and 12f in different rows is the main electrical coupling, which is different from the resonator 12b and the resonator.
  • the main components of the magnetic coupling between the devices 12e are opposite.
  • the main electrical coupling, the main magnetic coupling, and the main electrical coupling are formed, respectively. That is, alternating coupling in which electrical coupling is dominant and magnetic coupling is dominant.
  • a cross-coupled filter according to Embodiment 4 of the present invention includes a resonant structure 1, an upper cover plate 2, a lower cover plate 3, a signal input port 4, and a signal output port 5.
  • the filter formed by the resonant structure of the fourth embodiment of the invention is also a sixth-order filter, as shown in FIG. 11.
  • the difference from the third embodiment above is that the resonator 12a and the resonator 12b in the same row are mainly electrically coupled ,
  • the resonator 12b and the resonator 12c are mainly magnetically coupled, that is, multiple groups of adjacent resonators in the same row are alternately coupled in the form of electrical coupling and magnetic coupling; similarly, resonance in the same row
  • the main magnetic coupling is between the resonator 12d and the resonator 12e
  • the main electrical coupling is between the resonator 12e and the resonator 12f.
  • the resonator 12c and the resonator 12d in different rows are mainly electrically coupled, and the cross-coupling (defined as the first cross-coupling) generated between the resonators 12b and the resonator 12e in different rows is mainly the magnetic coupling.
  • the electrical coupling between the resonator 12c and the resonator 12d is opposite to the main component.
  • the cross-coupling (defined as the second cross-coupling) between the resonators 12a and 12f in different rows is mainly electrical coupling, which is different from the resonator 12b and the resonator.
  • the main components of the magnetic coupling between 12e are opposite, that is to say, between the resonator 12c and the resonator 12d, between the resonator 12b and the resonator 12e, and between the resonators 12a and 12f, the main and magnetic coupling are formed respectively.
  • Main coupling and main electrical coupling that is, alternating coupling of main electrical coupling and main magnetic coupling.
  • the first cross-coupling and the first cross-coupling have the opposite coupling form of the two-stage resonators (ie, the resonator 12c and the resonator 12d), and the second cross-coupling is opposite to the first cross-coupling coupling form.
  • two cross couplings are formed, and each cross coupling generates a transmission zero point around the bandwidth, thereby generating a total of four transmission zero points, as shown in FIG. 12.
  • the resonant tail of the resonator 12a is integrally formed with the rear side wall of the frame, and the resonant head is opposite to the resonant head of the resonator 12b to form an electrical coupling.
  • the resonant tail of the resonator 12b resonates with the resonator 12c.
  • the tail is connected and integrally formed with the left side wall of the frame to form the main magnetic coupling.
  • the resonant head of the resonator 12c faces the front side wall of the frame; the distribution of the resonators 12d, 12e and 12f in the other row
  • the structure is the same as the distribution structure of the resonator 12a, the resonator 12b, and the resonator 12c, and will not be repeated here.
  • a partition wall is arranged between the resonator 12c and the resonator 12d, and the partition wall makes the electrical coupling between the resonator 12c and the resonator 12d mainly; a partition wall is arranged between the resonator 12b and the resonator 12e, the partition wall The magnetic coupling between the resonator 12b and the resonator 12e is mainly formed; a partition wall is arranged between the resonator 12a and the resonator 12f, and the partition wall makes the electrical coupling between the resonator 12b and the resonator 12e mainly formed.
  • the magnetic coupling between the resonators 12c and the resonators 12d in different rows can also be the main magnetic coupling.
  • the first cross coupling between the resonators 12b and the resonators 12e in the different rows is electrical coupling.
  • the second cross-coupling between the resonators 12a and 12f in different rows is the main magnetic coupling, which is different from the resonator 12b and the resonator.
  • the electrical coupling between the devices 12e is opposite to the main components.
  • the main magnetic coupling, the main electric coupling, and the main magnetic coupling are formed, respectively. That is, alternating coupling in which magnetic coupling is dominant and electrical coupling is dominant.
  • a cross-coupled filter according to Embodiment 5 of the present invention includes a resonant structure 1, an upper cover plate 2, a lower cover plate 3, a signal input port 4, and a signal output port 5.
  • the filter formed by the resonant structure of Embodiment 5 of the invention is an 8-order filter, which includes a frame and two rows of resonant units integrally formed in the frame, each row of resonant units includes 4 resonators, that is, 8 resonators are arranged in the frame As shown in FIG.
  • each resonator 12a resonator 12b...resonator 12h
  • resonators 12a to 12d are in a row
  • resonator 12e are in a row.
  • the structure of each resonator is as described above and will not be repeated here.
  • Two rows of resonators are distributed in the frame along the left and right directions where the left and right walls of the frame are located. And the 8 resonators are arranged in a U-shaped signal transmission path within the frame. Specifically, the signal is input from the resonator 12a, passes through the resonator 12b to the resonator 12g, and finally outputs from the resonator 12h, that is, The signal input port of Embodiment 5 is electrically connected to the resonator 12a, and the signal output port is electrically connected to the resonator 12h.
  • the resonator 12a and the resonator 12b in the same row are mainly magnetically coupled
  • the resonator 12b and the resonator 12c are mainly electrically coupled
  • the resonator 12c and the resonator 12d are mainly magnetically coupled. That is to say, multiple groups of adjacent resonators in the same row are alternately coupled in the form of magnetic coupling and electrical coupling; similarly, the resonator 12e and the resonator 12f in the same row are mainly magnetically coupled and resonant
  • the main electrical coupling is between the resonator 12f and the resonator 12g
  • the main magnetic coupling is between the resonator 12g and the resonator 12h.
  • the resonator 12d and the resonator 12e in different rows are mainly electrically coupled, and the cross-coupling (defined as the first cross-coupling) generated between the resonators 12c and 12f in the different rows is mainly magnetic coupling.
  • the electrical coupling between the resonator 12d and the resonator 12e is opposite to the main component.
  • the cross-coupling (defined as the second cross-coupling) between the resonators 12b and 12g in different rows is mainly electrical coupling, which is different from the resonator 12c and the resonator.
  • the main component of the magnetic coupling between 12f is opposite.
  • the cross-coupling between the resonators 12a and 12h in different rows is the main magnetic coupling, and the electrical coupling between the resonator 12b and the resonator 12g
  • the main component of coupling is opposite. That is to say, between the resonator 12d and the resonator 12e, between the resonator 12c and the resonator 12f, between the resonator 12b and the resonator 12g, and between the resonators 12a and 12h, the main electrical coupling and the magnetic coupling are formed respectively.
  • Mainly, electric coupling, magnetic coupling that is, alternating coupling of electric coupling and magnetic coupling.
  • the first cross-coupling is opposite to that of the two-stage resonators after the first cross-coupling (ie resonator 12d and resonator 12e), the second cross-coupling is opposite to the first cross-coupling, and the third cross-coupling is opposite to the first
  • the coupling form of two cross coupling is opposite.
  • three cross couplings are formed, and each cross coupling generates a transmission zero point around the bandwidth, thereby generating a total of six transmission zero points, as shown in FIG. 17.
  • the resonant tails of the resonator 12a and the resonator 12b are connected and integrally formed with the left side wall of the frame to form a main magnetic coupling, while the resonant head faces the opposite direction.
  • the resonant head of the resonator 12a faces the rear of the frame.
  • the resonant head of the resonator 12b is opposite to the resonant head of the resonator 12c, forming the main electrical coupling.
  • the resonant tail of the resonator 12c is connected to the resonant tail of the resonator 12d and is integrally formed with the left side wall of the frame.
  • the magnetic coupling is mainly formed; the distribution structure of the resonators 12e ⁇ 12h in the other row is the same as the distribution structure of the resonators 12a ⁇ 12d, which will not be repeated here.
  • a partition wall is arranged between the resonator 12d and the resonator 12e, and the partition wall makes the electrical coupling between the resonator 12d and the resonator 12e mainly; a partition wall is arranged between the resonator 12c and the resonator 12f, the partition wall The magnetic coupling between the resonator 12c and the resonator 12f is mainly formed; a partition wall is arranged between the resonator 12b and the resonator 12g, and the partition wall makes the electrical coupling between the resonator 12b and the resonator 12g mainly, resonant A partition wall is arranged between the resonator 12a and the resonator 12h, and the partition wall mainly causes the magnetic coupling between the resonator 12a and the resonator 12h.
  • the magnetic coupling between the resonators 12d and the resonators 12e in different rows may also be the main magnetic coupling.
  • the first cross-coupling between the resonators 12c and the resonators 12f in the different rows is electrical coupling.
  • the second cross-coupling between the resonator 12b and the resonator 12g in a different row is the main magnetic coupling, and the resonator 12c and the resonance
  • the electrical coupling between the resonators 12f is opposite to the main component.
  • the third cross-coupling between the resonators 12a and 12h in different rows is the electrical coupling, and the magnetic coupling between the resonators 12b and 12g is
  • the main components are opposite. That is to say, between the resonator 12d and the resonator 12e, between the resonator 12c and the resonator 12f, the resonator 12b and the resonator 12g, the resonator 12a and the resonator 12h are magnetically coupled and electrically coupled respectively.
  • Mainly, magnetically coupled and electrically coupled that is, magnetically coupled and electrically coupled alternately.
  • a cross-coupling filter of Embodiment 6 of the present invention includes a resonant structure 1, an upper cover plate 2, a lower cover plate 3, a signal input port 4, and a signal output port 5.
  • the filter formed by the resonant structure of Embodiment 6 of the invention is also an 8-order filter.
  • the difference from Embodiment 5 above is that as shown in FIG. 21, the resonator 12a and the resonator 12b in the same row are mainly electrically coupled.
  • the resonator 12b and the resonator 12c are mainly magnetically coupled, and the resonator 12c and the resonator 12d are mainly electrically coupled, that is, multiple groups of adjacent resonators in the same row are mainly electrically coupled and Magnetic coupling is the main form of alternate coupling; similarly, the resonator 12e and the resonator 12f in the same row are mainly electrically coupled, and the resonator 12f and the resonator 12g are mainly magnetically coupled.
  • the resonator 12g and the resonator The main electrical coupling is between the devices 12h.
  • the resonator 12d and the resonator 12e in different rows are mainly magnetically coupled, and the cross-coupling (defined as the first cross-coupling) generated between the resonators 12c and 12f in the different rows is mainly electrical coupling, and the resonance
  • the main component of the magnetic coupling between the resonator 12d and the resonator 12e is opposite.
  • the cross-coupling (defined as the second cross-coupling) between the resonators 12b and 12g in different rows is the main magnetic coupling, which is different from the resonator 12c and the resonator.
  • the electrical coupling between 12f is opposite to the main component.
  • the cross-coupling (defined as the third cross-coupling) between the resonators 12a and 12h in different rows is the main electrical coupling, and the magnetic coupling between the resonators 12b and 12g
  • the main component of coupling is opposite. That is, between the resonator 12d and the resonator 12e, between the resonator 12c and the resonator 12f, between the resonator 12b and the resonator 12g, and between the resonators 12a and 12h, the main magnetic coupling and the electrical coupling are formed respectively.
  • Mainly, magnetically coupled, and electrically coupled that is, alternate coupling of magnetically coupled and electrically coupled.
  • the first cross-coupling is opposite to that of the two-stage resonators after the first cross-coupling (ie resonator 12d and resonator 12e), the second cross-coupling is opposite to the first cross-coupling, and the third cross-coupling is opposite to the first
  • the coupling form of two cross coupling is opposite.
  • three cross-couplings are formed, and each cross-coupling respectively generates a transmission zero point around the bandwidth, thereby generating a total of six transmission zero points, as shown in FIG. 22.
  • the resonant tail of the resonator 12a is integrally formed with the rear side wall of the frame, and the resonant head is opposite to the resonant head of the resonator 12b to form electrical coupling.
  • the resonant tail of the resonator 12b is connected to the resonant tail of the resonator 12c. And it is integrally formed with the left side wall of the frame to form the main magnetic coupling.
  • the resonant head of the resonator 12c is opposite to the resonant head of the resonator 12d to form an electrical coupling.
  • the resonant tail of the resonator 12d is connected to the front side of the frame.
  • the wall is integrally formed; the distribution structure of the resonators 12e ⁇ 12h in the other row is the same as the distribution structure of the resonators 12a ⁇ 12d, which will not be repeated here.
  • a partition wall is provided between the resonator 12d and the resonator 12e, and the partition wall makes the magnetic coupling between the resonator 12d and the resonator 12e mainly; a partition wall is provided between the resonator 12c and the resonator 12f, the partition wall The resonator 12c and the resonator 12f are mainly electrically coupled; a partition wall is arranged between the resonator 12b and the resonator 12g, and the partition wall causes the resonator 12b and the resonator 12g to form a magnetic coupling as the main, resonance A partition wall is arranged between the resonator 12a and the resonator 12h, and the partition wall makes the electrical coupling between the resonator 12a and the resonator 12h mainly.
  • the electrical coupling between the resonators 12d and 12e in different rows can also be mainly electrical coupling.
  • the first cross-coupling between the resonators 12c and the resonators 12f in different rows is the magnetic coupling.
  • the second cross-coupling between the resonators 12b and the resonator 12g in a different row is the main electrical coupling, which is different from the resonator 12c and the resonator 12c.
  • the main component of the magnetic coupling between the resonators 12f is opposite, the third cross-coupling between the resonators 12a and 12h in different rows is the main magnetic coupling, and the electrical coupling between the resonators 12b and 12g is The main components are opposite. That is to say, between the resonator 12d and the resonator 12e, between the resonator 12c and the resonator 12f, the resonator 12b and the resonator 12g, the resonator 12a and the resonator 12h are electrically coupled and magnetically coupled respectively.
  • Mainly, electric coupling is main
  • magnetic coupling is main, that is, alternating coupling of main electric coupling and main magnetic coupling.
  • the structural requirements of the filter may be narrow and long.
  • the two signal input ports and the signal output ports are relatively close.
  • the following modified structures can be used.
  • the above-mentioned embodiment 4 can be changed to the structures shown in Figs. 13 and 14, that is, as shown in Fig. 14, the 6 resonators in the frame 3 rows, 2 resonators in each row, and 6 resonators are arranged in the frame according to the S-shaped signal transmission path.
  • the above-mentioned embodiment 6 can be changed to the structure shown in Fig. 23 and Fig. 24 or Fig.
  • the 8 resonators in the frame are arranged in 4 rows, with 2 resonators in each row and 8 resonators in The frame is arranged according to multiple continuous U-shaped or S-row signal transmission paths.
  • the above-mentioned embodiment 5 can be changed to the structure shown in FIG. 18 and FIG. 19.
  • the present invention is also applicable to any other filters above the 4th order.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

一种交叉耦合滤波器，包括谐振结构（1），谐振结构（1）包括多排谐振单元，每排谐振单元包括至少两个谐振器（12），且同排的相邻两个谐振器（12）之间以电耦合为主或以磁耦合为主；相邻两排谐振单元的相邻两个谐振器（12）之间形成的耦合以电耦合为主或以磁耦合为主，且相邻两排谐振单元的多组相邻谐振器（12）以电耦合为主、磁耦合为主或磁耦合为主、电耦合为主相交替的形式耦合，且形成至少一组交叉耦合。该交叉耦合滤波器在结构特性上实现了小型化，轻量化，在电性能上实现了低损耗，具有良好的谐波特性。

Description

一种交叉耦合滤波器 技术领域
本发明涉及一种滤波器，尤其是涉及一种交叉耦合滤波器。
背景技术
近期滤波器需求趋势为小型化并要求高品质，尤其5G通信的小型基站中使用到的通信部件比起之前的宏基站产品，体积小并且需求数量多。因此产品内部使用到的部件也必须要做到高品质的小型化，轻量化，并且是要适合大批量生产的结构。
目前小型基站中使用到的滤波器通常为介质波导滤波器和传统金属同轴滤波器。介质波导滤波器可小型化及轻量化，制作成本低，但是比金属同轴滤波器的损耗及谐波特性差。传统的金属同轴滤波器相比介质波导滤波器损耗及谐波特性好，但在设计特性上尺寸及重量的缩减已达到一定极限，并且内部部件的数量上也达到极限，无法做到降低制作成本的目的。
如申请号为：CN201710149229.5的专利中，公开了一种框架结构方式的滤波器，在该方案中，口字型的框架两面为开放结构，分隔壁将框架内部分成两个空间。垂直于这个分隔壁，有一体型的谐振器。谐振器折弯为L型或T型来缩小空间要求，但是这样的形式对滤波器小型化体积还是有着局限性，难以满足滤波器微小体积的设计要求。
而且上述方案为了形成交叉耦合，在非相邻的谐振器之间按开路或短路的形式加入片状或线状导体的结构，需要在框架固定添加绝缘体或在谐振器焊接导线形式的导体。此类结构会产生加工费用以及加工公差，并且框架和谐振器为一体结构时，随环境温度滤波器的频率漂移量大。
又如在申请号为：CN 201910044005.7的专利中，公开了一种滤波器，谐振器进行多次折弯结构实现滤波器的小型化，且无需额外的结构件可实现交叉耦合。但是这种结构还是存在以下缺点：1、谐振器多次折弯虽然有利于小型化，但是相对来说Q值降低导致滤波器的电性能中的插入损耗变差；且在开模制作产品时，部件体积比普通的滤波器相对小且有折弯，在压铸成型时有变形的可能性；2、滤波器框架和谐振器为一体结构时,随温度变化通带频率的漂移量大导致滤波器电性能中的损耗及抑制度变差。
因此，需要提出一种新型的小型化、轻量化的滤波器，以解决上述滤波器存在的电性能中的插入损耗及抑制度变差、在压铸成型时有变形的可能性、需要2倍频谐波改善等问题。
发明内容
本发明的目的在于克服现有技术的缺陷，提供一种交叉耦合滤波器。
为实现上述目的，本发明提出如下技术方案：一种交叉耦合滤波器，包括谐振结构，所述谐振结构包括多排谐振单元，每排谐振单元包括至少两个谐振器，且同排的相邻两个谐振器之间以电耦合为主或以磁耦合为主，且同排的多组相邻谐振器以电耦合为主、磁耦合为主或磁耦合为主、电耦合为主相交替的形式耦合；相邻两排谐振单元的相邻两个谐振器之间形成的耦合以电耦合为主或以磁耦合为主，且相邻两排谐振单元的多组相邻谐振器以电耦合为主、磁耦合为主或磁耦合为主、电耦合为主相交替的形式耦合，且形成至少一组交叉耦合。
优选地，所述谐振结构为一体成型的，所述谐振结构还包括框架，所述谐振单元一体成型于所述框架上。
优选地，每个所述谐振器整体呈一柱体结构，且其包括相对的谐振头部和谐振尾部，所述谐振头部的宽度大于所述谐振尾部的宽度。
优选地，所述滤波器还包括设置于谐振器上的盖板，所述盖板包括分别设置于谐振结构上、下端面上的上盖板和下盖板，以形成一封闭的滤波 腔体。
优选地，所述上盖板和/或下盖板上包括多个凸起部、至少一屏蔽柱，其中，
所述凸起部自盖板靠近谐振结构的端面向靠近谐振结构的方向延伸形成，且凸起部在盖板上的设置位置与谐振结构上谐振器的谐振头部位置相对应；
所述屏蔽柱位于相邻的两个谐振器之间。
优选地，所述上盖板或下盖板上还包括至少一连接柱，所述连接柱设置于同排的相邻的两个谐振器之间，且连接上下盖板。
优选地，同排的相邻两个谐振器的谐振尾部相连，形成以磁耦合为主，或者谐振头部相对，形成以电耦合为主，且同排的多组相邻谐振器以谐振头部相对、谐振尾部相连或谐振尾部相连、谐振头部相对相交替的结构分布，使得同排的多组相邻谐振器以电耦合为主、磁耦合为主或磁耦合为主、电耦合为主交替形式耦合。
优选地，相邻两排的谐振单元之间设置有至少一分隔壁，所述分隔壁使相邻两排谐振单元的相邻两个谐振器之间形成的耦合以电耦合为主或磁耦合为主。
优选地，所述交叉耦合滤波器还包括至少一个用于增强谐振器间的交叉耦合量的结构件，所述结构件连接形成交叉耦合的两个谐振器。
优选地，所述盖板上还包括多个调谐螺钉和多个耦合调螺，所述谐振头部设有调谐孔，所述调谐螺钉穿过盖板且可延伸入对应谐振头部的所述调谐孔内，用于调整谐振器的谐振频率；所述耦合调螺穿过盖板且伸入到相邻两个谐振器之间，用于调整谐振器之间的耦合量。
优选地，所述多排谐振单元沿一条信号传输路径分布，所述信号传输路径为U型或S型或多个连续U型或连续S型形成的弯道路径。
优选地，所述滤波器还包括分别设置在所述信号传输路径的两个末端 的信号输入端口和信号输出端口。
优选地，所述滤波器为4阶以上的谐振器滤波器。
本发明的有益效果是：
1、将介质波导滤波器和金属同轴滤波器的优点尽可能融合，在结构特性上实现小型化，轻量化，在电性能上实现低损耗及良好的谐波特性。并且滤波器内部部件数量尽量最小化，实现了降低制作成本以及简单化生产工程以适合大批量生产。
2、滤波器的谐振结构采用整体框架一体结构，装配简单，装配公差一致性好，能保持稳定的产品质量。
3、盖板上的调整耦合量及改善谐波的屏蔽结构，可以减小谐振器的体积，实现滤波器的小型化，并改善谐振器的Q值，减少损耗等滤波特征。
附图说明
图1是本发明实施例1的分体结构示意图；
图2是本发明实施例1的谐振结构的结构示意图；
图3是本发明实施例1的仿真波形图；
图4是本发明实施例2的分体结构示意图；
图5是本发明实施例2的谐振结构的结构示意图；
图6是本发明实施例2的仿真波形图；
图7是本发明实施例3的分体结构示意图；
图8是本发明实施例3的谐振结构的结构示意图；
图9是本发明实施例3的仿真波形图；
图10是本发明实施例4的分体结构示意图；
图11是本发明实施例4的谐振结构的结构示意图；
图12是本发明实施例4的仿真波形图；
图13是本发明实施例4替换方案的分体结构示意图；
图14是本发明实施例4替换方案的谐振结构的结构示意图；
图15是本发明实施例5的分体结构示意图；
图16是本发明实施例5的谐振结构的结构示意图；
图17是本发明实施例5的仿真波形图；
图18是本发明实施例5替换方案的分体结构示意图；
图19是本发明实施例5替换方案的谐振结构的结构示意图；
图20是本发明实施例6的分体结构示意图；
图21是本发明实施例6的谐振结构的结构示意图；
图22是本发明实施例6的仿真波形图；
图23是本发明实施例6替换方案的分体结构示意图；
图24是本发明实施例6替换方案的谐振结构的结构示意图；
图25是本发明实施例6另一替换方案的谐振结构的结构示意图；
图26是本发明实施例6另一替换方案的分体结构示意图。
附图标记：
1、谐振结构，11、框架，12、谐振器，121、谐振头部，122、谐振中部，123、谐振尾部，124、调谐孔，2、上盖板，3、下盖板，4、信号输入端口，5、信号输出端口，6、分隔壁，S1、传输损耗波形图，S2、回波损耗波形图。
具体实施方式
下面将结合本发明的附图，对本发明实施例的技术方案进行清楚、完整的描述。
如图1所示，本发明所揭示的一种交叉耦合滤波器，包括谐振结构1、上盖板2、下盖板3、信号输入端口4和信号输出端口5，其中，谐振结构1采用整体框架一体式结构，其包括框架11和一体成型于该框架11内的多排谐振单元，每排谐振单元又包括至少两个谐振器12。与现有分体结构的 谐振结构相比，框架一体式的谐振结构1具有装配简单，装配公差一致性好，且能保持稳定的产品质量的优点，因此适合大批量生产。
当然作为可替换地，谐振结构1与上盖板2或下盖板3之间可通过固定结构(如螺钉，图未示)可拆卸安装，其包括多排谐振单元，即不包括框架11。实施时，谐振结构1和上盖板2或下盖板3上均设置固定孔(图未示)，螺钉穿过对应的固定孔将谐振结构1与上盖板2或下盖板3固定安装。
多排谐振单元在框架11内沿框架11的一侧壁向与该侧壁相对的另一侧壁延伸分布，如沿框架11的前、后侧壁所在的前后方向分布，或者框架11的左、右侧壁所在的左右方向分布，且位于同一平面上。
谐振器12的形状设计及其在框架11内的排布结构决定了谐振器12b之间的耦合方式。本实施例中，如图1所示，每个谐振器12整体呈一柱体结构，具体包括谐振头部121、谐振中部122、谐振尾部123，其中，谐振头部121是谐振器12电耦合为主强度最强的部位，反之，谐振尾部123是谐振器12磁耦合为主强度最强的部位。优选地，设计谐振头部121的宽度宽于谐振中部122及谐振尾部123的宽度，这样可以实现在同频率的要求下进一步减小谐振器12的体积。且，谐振头部121上设有贯穿其上、下端面的调谐孔124，用于调节谐振器12的谐振频率。当然，具有多个折弯部的谐振器结构同样适用于本发明。
多排谐振器12在框架11内沿一条信号传输路径排布，该信号传输路径可以是U型也可是S型，又或者多个连续U型或S型形成的弯道路径等。信号传输路径上相邻两个谐振器12的耦合方式由两者的形状及相互排布位置决定。需要解释的是，一般的TEM(transverse electromagnetic mode，横电磁波模式)模滤波器的耦合为电耦合为主和磁耦合为主共存，这两种耦合中耦合量大的一种称为主导耦合，本发明滤波器中的主导耦合的模式可以由相耦合的两谐振器的排布位置决定。如两者的耦合量主要由谐振头 部所产生，则主耦合为电耦合为主，如两者的耦合量主要由谐振尾部所产生，则主耦合为磁耦合为主，又如两者之间的电耦合为主的量和磁耦合为主的量大小悬殊差距不大，则为电磁混合耦合。
本实施例中，在信号传输路径上，同排的相邻两个谐振器12之间以电耦合为主或磁耦合为主，即相邻两个谐振器12的耦合量主要由谐振头部121或谐振尾部123所产生，具体地，同排的相邻两个谐振器12的两个谐振头部121相对设置，形成以电耦合为主，或者两个谐振尾部123相连，形成以磁耦合为主。当然，同排的谐振器12的排布方式不局限于这里介绍的这种，只要能实现相邻两个谐振器12之间可以形成以电耦合为主或以磁耦合为主的排布结构都在本发明的保护范围之内。
且同排的谐振器12形成一组相邻谐振器12或多组相邻谐振器12，其中，形成一组相邻谐振器12(即一排有两个谐振器12)时，这一组谐振器12之间即谐振头部121相对设置，形成以电耦合为主，或者两个谐振尾部123相连，形成以磁耦合为主。
当形成多组相邻谐振器12(即一排有三个以上谐振器12)时，这些多组相邻谐振器12则以电耦合为主、磁耦合为主或磁耦合为主、电耦合为主相交替的形式耦合。具体地，同排的多组相邻谐振器12以谐振头部121相对、谐振尾部123相连相交替的结构分布，即前一组相邻谐振器12以谐振头部121相对结构分布，则后一组相邻谐振器12则以谐振尾部123相连结构分布；或谐振尾部123相连、谐振头部121相对相交替的结构分布。
相邻两排的相邻两个谐振器12之间以电耦合为主或磁耦合为主，本实施例中，相邻两排的相邻两个谐振器12的位置对应设置，具体地，相邻两排的相邻两个谐振器12平行或近似平行排布，且两者的谐振头部121或谐振尾部123的朝向是相同的，如两个谐振头部121均朝向前或均朝向后，且两个谐振头部121的位置相对应，两个谐振尾部123的位置也相对应。
相邻两排的谐振单元之间设置有至少一分隔壁，这些分隔壁使相邻两排谐振单元的相邻两个谐振器之间形成的耦合以电耦合为主或磁耦合为主。其中，分隔壁在两个谐振器之间的设置位置，以其能实现这两个谐振器以电耦合为主或磁耦合为主，本发明对此不做限定。分隔壁实施时可以设置在框架上，也可以和/或设置在盖板上。
且相邻两排的多组相邻谐振器12以电耦合为主、磁耦合为主，或磁耦合为主、电耦合为主相交替的形式耦合，即不同排的一组相邻谐振器12的耦合方式为以电耦合为主，则与之相邻的一组或两组相邻谐振器12的耦合方式则为以磁耦合为主。且相邻两排的多组相邻谐振器12中形成至少一组交叉耦合，该交叉耦合在带宽左右分别产生一个传输零点，且根据谐振器12的数量，可增加交叉耦合的数量从而来增加零点的数量。本发明谐振器12之间交叉耦合的实现无需额外的结构件，但是形成交叉耦合的相邻两个谐振器12之间根据情况可增加额外的结构件(如金属杆、绝缘体等支撑件，图未示)实现，以进一步增加交叉耦合量。
上盖板2和下盖板3分别盖合在谐振结构1的上端面和下端面上，以形成一封闭的滤波腔体。为了调节谐振结构上谐振器之间的耦合量等，盖板(上盖板和/或下盖板)上可以设置包括多个凸起部(图未示)、至少一屏蔽柱(图未示)和至少一连接柱(图未示)，其中，凸起部自盖板靠近谐振结构的那一端面向靠近谐振结构1的方向延伸形成，且凸起部在盖板上的设置位置与谐振器12的谐振头部121位置相对应，这样会拉近盖板与谐振器12的谐振头部121的距离，因为离谐振器12越近，分布电容越大，随之谐振频率降低，这样可有效缩短谐振器长度，进而相对的减少了滤波器的体积，以此来实现滤波器的小型化，及改善谐振器的Q值，减少损耗。
屏蔽柱设置于相邻两个谐振器12之间，用于调整两个谐振器12之间的耦合强弱，屏蔽柱即形成盖板内的上述分隔壁。虽然谐振器12之间的耦合强弱可由谐振器12之间的间距来调整，但是这种方式可能带来滤波器体 积变大，而设置屏蔽柱，在可调整谐振器12之间耦合强弱的基础上，并不影响滤波器体积。
连接柱设置于同排的相邻的两个谐振器12之间，且连接上下盖板2、3。连接柱的设置可改善滤波器的谐波特性。连接柱实施时，设置在上盖板或者下盖板上。
另外，上盖板2上还可设置多个穿过上盖板2且下端伸入到谐振器的上述调谐孔124内的调谐螺钉(图未示)，用于调整谐振器12的谐振频率；及穿过上盖板2且下端伸入到相邻两个谐振器12之间耦合调螺(图未示)，用于调整各谐振器12之间的耦合量。
另外，上盖板和下盖板中的其中一个装配谐振器后，另一个盖板的结构可简化，如减小厚度，及不设置上述凸起部、分隔壁、连接柱等结构，这样可整体降低滤波器的厚度及体积。
信号输入端口4和信号输出端口5分别设置在上述信号传输路径的两个末端，根据信号传输路径的不同，其设置位置也可以相应不同。
下面以几个实施例来介绍下本发明一种交叉耦合滤波器的具体结构。
实施例1
结合图1和图2所示，本发明实施例1的一种交叉耦合滤波器，包括谐振结构1、上盖板2、下盖板3、信号输入端口4和信号输出端口5，其中，上盖板2、下盖板3、信号输入端口4和信号输出端口5的结构可参见上述描述，这里不再赘述，主要介绍下谐振结构1的结构。
如图2所示，本发明实施例1的谐振结构1形成的滤波器为4阶滤波器，其包括框架11和一体成型于框架11内的两排谐振单元，每排谐振单元包括2个谐振器12，即框架内设置4个谐振器12，为了便于描述，定义这4个谐振器分别为谐振器12a、谐振器12b……谐振器12d，其中，谐振器12a、谐振器12b为一排，谐振器12c、谐振器12d为一排。每个谐振器的结构如上面所描述的，这里不再赘述。
两排谐振器12在框架内沿框架的左、右侧壁所在的左右方向分布。且4个谐振器在框架内按U型信号传输路径排布，具体地，信号自谐振器12a输入，依次经过谐振器12b、谐振器12c后，最后自谐振器12d输出，也就是说，本实施例1的信号输入端口与谐振器12a相电连，信号输出端口与谐振器12d相电连。
其中，同排的谐振器12a和谐振器12b之间、谐振器12c和谐振器12d之间为磁耦合为主，不同排的谐振器12b和谐振器12c之间为电耦合为主，不同排的谐振器12a和谐振器12d之间产生的交叉耦合(定义为第一交叉耦合)为磁耦合为主，与谐振器12b和谐振器12c之间的电耦合为主成分相反。也就是说，谐振器12b和谐振器12c之间、谐振器12a和谐振器12d之间分别形成电耦合为主、磁耦合为主，即电耦合为主和磁耦合为主的交替耦合。且第一交叉耦合与第一交叉耦合后两级谐振器(即谐振器12b和谐振器12c)的耦合形式相反。本实施例1形成1个交叉耦合，每个交叉耦合在带宽左右分别产生一个传输零点，从而共产生2个传输零点，如图3所示。
具体地，谐振器12a和谐振器12b的谐振尾部相连且与框架的左侧壁一体成型，形成以磁耦合为主，谐振头部则各自朝向框架的后侧壁和前侧壁，且与后侧壁和前侧壁均不接触；同样，谐振器12c和谐振器12d的谐振尾部相连且与框架的右侧壁一体成型，形成以磁耦合为主，谐振头部则各自朝向框架的后侧壁和前侧壁，且与后侧壁和前侧壁均不接触。谐振器12b和谐振器12c之间设置一分隔壁，该分隔壁使谐振器12b和谐振器12c之间形成以电耦合为主；谐振器12a和谐振器12d之间设置一分隔壁，该分隔壁使谐振器12a和谐振器12d之间形成以磁耦合为主。
作为可替换地，不同排的谐振器12b和谐振器12c之间也可为磁耦合为主，这样，不同排的谐振器12a和谐振器12d之间产生的第一交叉耦合则为电耦合为主，与谐振器12b和谐振器12c之间的磁耦合为主成分相反。 也就是说，谐振器12b和谐振器12c之间、谐振器12a和谐振器12d之间分别形成磁耦合为主、电耦合为主，即磁耦合为主和电耦合为主的交替耦合。
实施例2
结合图4和图5所示，本发明实施例2的一种交叉耦合滤波器，包括谐振结构1、上盖板2、下盖板3、信号输入端口4和信号输出端口5，其中，本发明实施例2的谐振结构形成的滤波器同样为4阶滤波器，与实施例1不同的是，如图5所示，同排的谐振器12a和谐振器12b之间、谐振器12c和谐振器12d之间为电耦合为主，不同排的谐振器12b和谐振器12c之间为磁耦合为主，不同排的谐振器12a和谐振器12d之间产生的交叉耦合(定义为第一交叉耦合)为电耦合为主，与谐振器12b和谐振器12c之间的磁耦合为主成分相反。也就是说，谐振器12b和谐振器12c之间、谐振器12a和谐振器12d之间分别形成磁耦合为主、电耦合为主，即磁耦合为主和电耦合为主的交替耦合。本实施例2形成1个交叉耦合，每个交叉耦合在带宽左右分别产生一个传输零点，从而共产生2个传输零点，如图6所示。
具体地，谐振器12a的谐振尾部与框架的后侧壁一体成型，谐振头部与谐振器12b的谐振头部相对设置且之间形成耦合间隙，形成以电耦合为主，谐振器12b的谐振尾部与框架的前侧壁一体成型；同样，谐振器12c的谐振尾部与框架的后侧壁一体成型，谐振头部与谐振器12d的谐振头部相对设置且之间形成耦合间隙，形成以电耦合为主，谐振器12d的谐振尾部与框架的前侧壁一体成型。谐振器12b和谐振器12c之间设置一分隔壁，该分隔壁设置于下盖板3内，该分隔壁使谐振器12b和谐振器12c之间形成以磁耦合为主；谐振器12a和谐振器12d之间设置一分隔壁，该分隔壁设置于框架上，其使谐振器12a和谐振器12d之间形成以电耦合为主。
作为可替换地，不同排的谐振器12b和谐振器12c之间也可为以电耦合为主，这样，不同排的谐振器12a和谐振器12d之间产生的第一交叉耦合则为以磁耦合为主，与谐振器12b和谐振器12c之间的以电耦合为主成分相反。也就是说，谐振器12b和谐振器12c之间、谐振器12a和谐振器12d之间分别形成以电耦合为主、以磁耦合为主，即形成以电耦合为主和以磁耦合为主的交替耦合。
实施例3
结合图7和图8所示，本发明实施例3的一种交叉耦合滤波器，包括谐振结构1、上盖板2、下盖板3、信号输入端口4和信号输出端口5，其中，上盖板2、下盖板3、信号输入端口4和信号输出端口5的结构可参见上述描述，这里不再赘述，主要介绍下谐振结构1的结构。
如图8所示，本发明实施例1的谐振结构1形成的滤波器为6阶滤波器，其包括框架11和一体成型于框架11内的两排谐振单元，每排谐振单元包括3个谐振器12，即框架内设置6个谐振器12，为了便于描述，定义这6个谐振器分别为谐振器12a、谐振器12b……谐振器12f，其中，谐振器12a～谐振器12c为一排，谐振器12d～谐振器12f为一排。每个谐振器的结构如上面所描述的，这里不再赘述。
两排谐振器12在框架内沿框架的左、右侧壁所在的左右方向分布。且6个谐振器在框架内按U型信号传输路径排布，具体地，信号自谐振器12a输入，依次经过谐振器12b～谐振器12e后，最后自谐振器12f输出，也就是说，本实施例1的信号输入端口与谐振器12a相电连，信号输出端口与谐振器12f相电连。
其中，同排的谐振器12a和谐振器12b之间为磁耦合为主，谐振器12b和谐振器12c之间为电耦合为主，也就是说同排的多组相邻谐振器以磁耦合为主和电耦合为主的形式交替耦合；同样的，同排的谐振器12d和谐振器12e之间为电耦合为主，谐振器12e和谐振器12f之间为磁耦合为主。不 同排的谐振器12c和谐振器12d之间为磁耦合为主，不同排的谐振器12b和谐振器12e之间产生的交叉耦合(定义为第一交叉耦合)为电耦合为主，与谐振器12c和谐振器12d之间的磁耦合为主成分相反，不同排的谐振器12a和12f之间的交叉耦合(定义为第二交叉耦合)为磁耦合为主，与谐振器12b和谐振器12e之间的电耦合为主成分相反，也就是说，谐振器12c和谐振器12d之间、谐振器12b和谐振器12e之间及谐振器12a和12f之间分别形成磁耦合为主、电耦合为主、磁耦合为主，即磁耦合为主和电耦合为主的交替耦合。且第一交叉耦合与第一交叉耦合后两级谐振器(即谐振器12c和谐振器12d)的耦合形式相反，第二交叉耦合与第一交叉耦合的耦合形式相反。本实施例3形成2个交叉耦合，每个交叉耦合在带宽左右分别产生一个传输零点，从而共产生4个传输零点，如图9所示。
具体地，谐振器12a和谐振器12b的谐振尾部相连且与框架的左侧壁一体成型，形成以磁耦合为主，谐振头部则朝向相反，其中，谐振器12a的谐振头部朝向框架的后侧壁，谐振器12b的谐振头部则与谐振器12c的谐振头部相对，形成以电耦合为主，谐振器12c的谐振尾部与框架前侧壁一体成型；另一排的谐振器12d、谐振器12e和谐振器12f的分布结构与谐振器12a、谐振器12b和谐振器12c的分布结构相同，这里不做赘述。
谐振器12c和谐振器12d之间设置一分隔壁，该分隔壁设置于下盖板3上，使谐振器12c和谐振器12d之间形成以磁耦合为主；谐振器12b和谐振器12e之间设置一分隔壁，该分隔壁使谐振器12b和谐振器12e之间形成电耦合为主；谐振器12a和谐振器12f之间设置一分隔壁，该分隔壁使谐振器12b和谐振器12e之间形成磁耦合为主。
作为可替换地，不同排的谐振器12c和谐振器12d之间也可为电耦合为主，这样，不同排的谐振器12b和谐振器12e之间产生的第一交叉耦合则为磁耦合为主，与谐振器12c和谐振器12d之间的电耦合为主成分相反，不同排的谐振器12a和谐振器12f之间产生的第二交叉耦合为电耦合为主， 与谐振器12b和谐振器12e之间的磁耦合为主成分相反。也就是说，谐振器12c和谐振器12d之间、谐振器12b和谐振器12e之间、谐振器12a和谐振器12f之间分别形成电耦合为主、磁耦合为主和电耦合为主，即电耦合为主和磁耦合为主的交替耦合。
实施例4
结合图10和图11所示，本发明实施例4的一种交叉耦合滤波器，包括谐振结构1、上盖板2、下盖板3、信号输入端口4和信号输出端口5，其中，本发明实施例4的谐振结构形成的滤波器同样为6阶滤波器，如图11所示，与上述实施例3不同的是，同排的谐振器12a和谐振器12b之间为电耦合为主，谐振器12b和谐振器12c之间为磁耦合为主，也就是说同排的多组相邻谐振器以电耦合为主和磁耦合为主的形式交替耦合；同样的，同排的谐振器12d和谐振器12e之间为磁耦合为主，谐振器12e和谐振器12f之间为电耦合为主。
不同排的谐振器12c和谐振器12d之间为电耦合为主，不同排的谐振器12b和谐振器12e之间产生的交叉耦合(定义为第一交叉耦合)为磁耦合为主，与谐振器12c和谐振器12d之间的电耦合为主成分相反，不同排的谐振器12a和12f之间的交叉耦合(定义为第二交叉耦合)为电耦合为主，与谐振器12b和谐振器12e之间的磁耦合为主成分相反，也就是说，谐振器12c和谐振器12d之间、谐振器12b和谐振器12e之间及谐振器12a和12f之间分别形成电耦合为主、磁耦合为主、电耦合为主，即电耦合为主和磁耦合为主的交替耦合。且同样，第一交叉耦合与第一交叉耦合后两级谐振器(即谐振器12c和谐振器12d)的耦合形式相反，第二交叉耦合与第一交叉耦合的耦合形式相反。本实施例3形成2个交叉耦合，每个交叉耦合在带宽左右分别产生一个传输零点，从而共产生4个传输零点，如图12所示。
具体地，谐振器12a的谐振尾部与框架的后侧壁一体成型，谐振头部则与谐振器12b的谐振头部相对，形成电耦合为主，谐振器12b的谐振尾部与谐振器12c的谐振尾部相连且与框架的左侧壁一体成型，形成磁耦合为主，谐振器12c的谐振头部则朝向框架的前侧壁；另一排的谐振器12d、谐振器12e和谐振器12f的分布结构与谐振器12a、谐振器12b和谐振器12c的分布结构相同，这里不做赘述。
谐振器12c和谐振器12d之间设置一分隔壁，该分隔壁使谐振器12c和谐振器12d之间形成电耦合为主；谐振器12b和谐振器12e之间设置一分隔壁，该分隔壁使谐振器12b和谐振器12e之间形成磁耦合为主；谐振器12a和谐振器12f之间设置一分隔壁，该分隔壁使谐振器12b和谐振器12e之间形成电耦合为主。
作为可替换地，不同排的谐振器12c和谐振器12d之间也可为磁耦合为主，这样，不同排的谐振器12b和谐振器12e之间产生的第一交叉耦合则为电耦合为主，与谐振器12c和谐振器12d之间的电耦合为主成分相反，不同排的谐振器12a和谐振器12f之间产生的第二交叉耦合为磁耦合为主，与谐振器12b和谐振器12e之间的电耦合为主成分相反。也就是说，谐振器12c和谐振器12d之间、谐振器12b和谐振器12e之间、谐振器12a和谐振器12f之间分别形成磁耦合为主、电耦合为主和磁耦合为主，即磁耦合为主和电耦合为主的交替耦合。
实施例5
结合图15和图16所示，本发明实施例5的一种交叉耦合滤波器，包括谐振结构1、上盖板2、下盖板3、信号输入端口4和信号输出端口5，其中，本发明实施例5的谐振结构形成的滤波器为8阶滤波器，其包括框架和一体成型于框架内的两排谐振单元，每排谐振单元包括4个谐振器，即框架内设置8个谐振器，结合图16所示，同样，为了便于描述，定义这8个谐振器分别为谐振器12a、谐振器12b……谐振器12h，其中，谐振器 12a～谐振器12d为一排，谐振器12e～谐振器12h为一排。每个谐振器的结构如上面所描述的，这里不再赘述。
两排谐振器在框架内沿框架的左、右侧壁所在的左右方向分布。且8个谐振器在框架内按U型信号传输路径排布，具体地，信号自谐振器12a输入，依次经过谐振器12b～谐振器12g后，最后自谐振器12h输出，也就是说，本实施例5的信号输入端口与谐振器12a相电连，信号输出端口与谐振器12h相电连。
其中，同排的谐振器12a和谐振器12b之间为磁耦合为主，谐振器12b和谐振器12c之间为电耦合为主，谐振器12c和谐振器12d之间为磁耦合为主，也就是说，同排的多组相邻谐振器以磁耦合为主和电耦合为主的形式交替耦合；同样的，同排的谐振器12e和谐振器12f之间为磁耦合为主，谐振器12f和谐振器12g之间为电耦合为主，谐振器12g和谐振器12h之间为磁耦合为主。不同排的谐振器12d和谐振器12e之间为电耦合为主，不同排的谐振器12c和谐振器12f之间产生的交叉耦合(定义为第一交叉耦合)为磁耦合为主，与谐振器12d和谐振器12e之间的电耦合为主成分相反，不同排的谐振器12b和12g之间的交叉耦合(定义为第二交叉耦合)为电耦合为主，与谐振器12c和谐振器12f之间的磁耦合为主成分相反，不同排的谐振器12a和12h之间的交叉耦合(定义为第三交叉耦合)为磁耦合为主，与谐振器12b和谐振器12g之间的电耦合为主成分相反。也就是说，谐振器12d和谐振器12e之间、谐振器12c和谐振器12f之间、谐振器12b和谐振器12g之间及谐振器12a和12h之间分别形成电耦合为主、磁耦合为主、电耦合为主、磁耦合为主，即电耦合为主和磁耦合为主的交替耦合。且第一交叉耦合与第一交叉耦合后两级谐振器(即谐振器12d和谐振器12e)的耦合形式相反，第二交叉耦合与第一交叉耦合的耦合形式相反，第三交叉耦合与第二交叉耦合的耦合形式相反。本实施例5形成3个 交叉耦合，每个交叉耦合在带宽左右分别产生一个传输零点，从而共产生6个传输零点，如图17所示。
具体地，谐振器12a和谐振器12b的谐振尾部相连且与框架的左侧壁一体成型，形成磁耦合为主，谐振头部则朝向相反，其中，谐振器12a的谐振头部朝向框架的后侧壁，谐振器12b的谐振头部则与谐振器12c的谐振头部相对，形成电耦合为主，谐振器12c的谐振尾部与谐振器12d的谐振尾部相连且与框架左侧壁一体成型，形成磁耦合为主；另一排的谐振器12e～谐振器12h的分布结构与谐振器12a～谐振器12d的分布结构相同，这里不做赘述。
谐振器12d和谐振器12e之间设置一分隔壁，该分隔壁使谐振器12d和谐振器12e之间形成电耦合为主；谐振器12c和谐振器12f之间设置一分隔壁，该分隔壁使谐振器12c和谐振器12f之间形成磁耦合为主；谐振器12b和谐振器12g之间设置一分隔壁，该分隔壁使谐振器12b和谐振器12g之间形成电耦合为主，谐振器12a和谐振器12h之间设置一分隔壁，该分隔壁使谐振器12a和谐振器12h之间形成磁耦合为主。
作为可替换地，不同排的谐振器12d和谐振器12e之间也可为磁耦合为主，这样，不同排的谐振器12c和谐振器12f之间产生的第一交叉耦合则为电耦合为主，与谐振器12d和谐振器12e之间的磁耦合为主成分相反，不同排的谐振器12b和谐振器12g之间产生的第二交叉耦合为磁耦合为主，与谐振器12c和谐振器12f之间的电耦合为主成分相反，不同排的谐振器12a和谐振器12h之间产生的第三交叉耦合为电耦合为主，与谐振器12b和谐振器12g之间的磁耦合为主成分相反。也就是说，谐振器12d和谐振器12e之间、谐振器12c和谐振器12f之间、谐振器12b和谐振器12g、谐振器12a和谐振器12h之间分别形成磁耦合为主、电耦合为主、磁耦合为主和电耦合为主，即磁耦合为主和电耦合为主的交替耦合。
实施例6
结合图20和图21所示，本发明实施例6的一种交叉耦合滤波器，包括谐振结构1、上盖板2、下盖板3、信号输入端口4和信号输出端口5，其中，本发明实施例6的谐振结构形成的滤波器同样为8阶滤波器，与上述实施例5不同的是，如图21所示，同排的谐振器12a和谐振器12b之间为电耦合为主，谐振器12b和谐振器12c之间为磁耦合为主，谐振器12c和谐振器12d之间为电耦合为主，也就是说，同排的多组相邻谐振器以电耦合为主和磁耦合为主的形式交替耦合；同样的，同排的谐振器12e和谐振器12f之间为电耦合为主，谐振器12f和谐振器12g之间为磁耦合为主，谐振器12g和谐振器12h之间为电耦合为主。不同排的谐振器12d和谐振器12e之间为磁耦合为主，不同排的谐振器12c和谐振器12f之间产生的交叉耦合(定义为第一交叉耦合)为电耦合为主，与谐振器12d和谐振器12e之间的磁耦合为主成分相反，不同排的谐振器12b和12g之间的交叉耦合(定义为第二交叉耦合)为磁耦合为主，与谐振器12c和谐振器12f之间的电耦合为主成分相反，不同排的谐振器12a和12h之间的交叉耦合(定义为第三交叉耦合)为电耦合为主，与谐振器12b和谐振器12g之间的磁耦合为主成分相反。也就是说，谐振器12d和谐振器12e之间、谐振器12c和谐振器12f之间、谐振器12b和谐振器12g之间及谐振器12a和12h之间分别形成磁耦合为主、电耦合为主、磁耦合为主、电耦合为主，即磁耦合为主和电耦合为主的交替耦合。且第一交叉耦合与第一交叉耦合后两级谐振器(即谐振器12d和谐振器12e)的耦合形式相反，第二交叉耦合与第一交叉耦合的耦合形式相反，第三交叉耦合与第二交叉耦合的耦合形式相反。本实施例6形成3个交叉耦合，每个交叉耦合在带宽左右分别产生一个传输零点，从而共产生6个传输零点，如图22所示。
具体地，谐振器12a的谐振尾部与框架的后侧壁一体成型，谐振头部与谐振器12b谐振头部相对，形成电耦合为主，谐振器12b的谐振尾部与谐振器12c的谐振尾部相连且与框架的左侧壁一体成型，形成磁耦合为主， 谐振器12c的谐振头部与谐振器12d的谐振头部相对，形成电耦合为主，谐振器12d的谐振尾部与框架的前侧壁一体成型；另一排的谐振器12e～谐振器12h的分布结构与谐振器12a～谐振器12d的分布结构相同，这里不做赘述。
谐振器12d和谐振器12e之间设置一分隔壁，该分隔壁使谐振器12d和谐振器12e之间形成磁耦合为主；谐振器12c和谐振器12f之间设置一分隔壁，该分隔壁使谐振器12c和谐振器12f之间形成电耦合为主；谐振器12b和谐振器12g之间设置一分隔壁，该分隔壁使谐振器12b和谐振器12g之间形成磁耦合为主，谐振器12a和谐振器12h之间设置一分隔壁，该分隔壁使谐振器12a和谐振器12h之间形成电耦合为主。
作为可替换地，不同排的谐振器12d和谐振器12e之间也可为电耦合为主，这样，不同排的谐振器12c和谐振器12f之间产生的第一交叉耦合则为磁耦合为主，与谐振器12d和谐振器12e之间的电耦合为主成分相反，不同排的谐振器12b和谐振器12g之间产生的第二交叉耦合为电耦合为主，与谐振器12c和谐振器12f之间的磁耦合为主成分相反，不同排的谐振器12a和谐振器12h之间产生的第三交叉耦合为磁耦合为主，与谐振器12b和谐振器12g之间的电耦合为主成分相反。也就是说，谐振器12d和谐振器12e之间、谐振器12c和谐振器12f之间、谐振器12b和谐振器12g、谐振器12a和谐振器12h之间分别形成电耦合为主、磁耦合为主、电耦合为主、磁耦合为主，即电耦合为主和磁耦合为主的交替耦合。
另外，根据滤波器的空间要求，滤波器的结构需求有可能是窄，长的形式，上述实施例4～6中，两个信号输入端口和信号输出端口距离相对较近，根据实际需要，将两个信号输入端口和信号输出端口拉远时可以使用如下变化结构，如上述实施例4可变化为图13和图14所示结构，即如图14所示，框架内的6个谐振器按3排，每排2个谐振器分布，且6个谐振器在框架内按S型信号传输路径排布。又如上述实施例6可变化为图23和 图24或图25和图26所示结构，即框架内的8个谐振器按4排，每排2个谐振器分布，且8个谐振器在框架内按多个连续U型或S行形成的信号传输路径排布。又如上述实施例5可变化为图18和图19所示结构。
除上述实施例1～6所介绍的4阶、6阶、8阶滤波器外，本发明也适用于4阶以上的其他任意一种滤波器。
本发明的技术内容及技术特征已揭示如上，然而熟悉本领域的技术人员仍可能基于本发明的教示及揭示而作种种不背离本发明精神的替换及修饰，因此，本发明保护范围应不限于实施例所揭示的内容，而应包括各种不背离本发明的替换及修饰，并为本专利申请权利要求所涵盖。

Claims (10)

  1. 一种交叉耦合滤波器，其特征在于，其包括：
    谐振结构，所述谐振结构包括多排谐振单元，每排谐振单元包括至少两个谐振器，且同排的相邻两个谐振器之间以电耦合为主或以磁耦合为主，且同排的多组相邻谐振器以电耦合为主、磁耦合为主或磁耦合为主、电耦合为主相交替的形式耦合；相邻两排谐振单元的相邻两个谐振器之间形成的耦合以电耦合为主或以磁耦合为主，且相邻两排谐振单元的多组相邻谐振器以电耦合为主、磁耦合为主或磁耦合为主、电耦合为主相交替的形式耦合，且形成至少一组交叉耦合。
  2. 根据权利要求1所述的交叉耦合滤波器，其特征在于，所述谐振结构为一体成型的，所述谐振结构还包括框架，所述谐振单元一体成型于所述框架上。
  3. 根据权利要求1所述的交叉耦合滤波器，其特征在于，每个所述谐振器整体呈一柱体结构，且其包括相对的谐振头部和谐振尾部，所述谐振头部的宽度大于所述谐振尾部的宽度。
  4. 根据权利要求3所述的交叉耦合滤波器，其特征在于，所述滤波器还包括设置于谐振器上的盖板，所述盖板包括分别设置于谐振结构上、下端面上的上盖板和下盖板，以形成一封闭的滤波腔体。
  5. 根据权利要求4所述的交叉耦合滤波器，其特征在于，所述上盖板和/或下盖板上包括多个凸起部、至少一屏蔽柱，其中，
    所述凸起部自盖板靠近谐振结构的端面向靠近谐振结构的方向延伸形成，且凸起部在盖板上的设置位置与谐振结构上谐振器的谐振头部位置相对应；
    所述屏蔽柱位于相邻的两个谐振器之间。
  6. 根据权利要求3所述的交叉耦合滤波器，其特征在于，同排的相邻两 个谐振器的谐振尾部相连，形成以磁耦合为主，或者谐振头部相对，形成以电耦合为主，且同排的多组相邻谐振器以谐振头部相对、谐振尾部相连或谐振尾部相连、谐振头部相对相交替的结构分布，使得同排的多组相邻谐振器以电耦合为主、磁耦合为主或磁耦合为主、电耦合为主交替形式耦合。
  7. 根据权利要求1所述的交叉耦合滤波器，其特征在于，所述相邻两排的谐振单元之间设置有至少一分隔壁，所述分隔壁使相邻两排谐振单元的相邻两个谐振器之间形成的耦合以电耦合为主或磁耦合为主。
  8. 根据权利要求1所述的交叉耦合滤波器，其特征在于，所述交叉耦合滤波器还包括至少一个用于增强谐振器间的交叉耦合量的结构件，所述结构件连接形成交叉耦合的两个谐振器。
  9. 根据权利要求4所述的交叉耦合滤波器，其特征在于，所述盖板上还包括多个调谐螺钉和多个耦合调螺，所述谐振头部设有调谐孔，所述调谐螺钉穿过盖板且可延伸入对应谐振头部的所述调谐孔内，用于调整谐振器的谐振频率；所述耦合调螺穿过盖板且伸入到相邻两个谐振器之间，用于调整谐振器之间的耦合量。
  10. 根据权利要求1所述的交叉耦合滤波器，其特征在于，所述多排谐振单元沿一条信号传输路径分布，所述信号传输路径为U型或S型或多个连续U型或连续S型形成的弯道路径。
PCT/CN2019/086796 2019-05-14 2019-05-14 一种交叉耦合滤波器 Ceased WO2020227919A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/CN2019/086796 WO2020227919A1 (zh) 2019-05-14 2019-05-14 一种交叉耦合滤波器
EP19928759.0A EP3972047A4 (en) 2019-05-14 2019-05-14 CROSS-COUPLED FILTER
US17/523,449 US11799181B2 (en) 2019-05-14 2021-11-10 Cross-coupled filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/086796 WO2020227919A1 (zh) 2019-05-14 2019-05-14 一种交叉耦合滤波器

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/523,449 Continuation US11799181B2 (en) 2019-05-14 2021-11-10 Cross-coupled filter

Publications (1)

Publication Number Publication Date
WO2020227919A1 true WO2020227919A1 (zh) 2020-11-19

Family

ID=73290103

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/086796 Ceased WO2020227919A1 (zh) 2019-05-14 2019-05-14 一种交叉耦合滤波器

Country Status (3)

Country Link
US (1) US11799181B2 (zh)
EP (1) EP3972047A4 (zh)
WO (1) WO2020227919A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021022471A1 (zh) * 2019-08-06 2021-02-11 罗森伯格技术（昆山）有限公司 一种交叉耦合滤波器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216448A (en) * 1977-01-21 1980-08-05 Nippon Electric Co., Ltd. Microwave distributed-constant band-pass filter comprising projections adjacent on capacitively coupled resonator rods to open ends thereof
US5410284A (en) * 1992-12-09 1995-04-25 Allen Telecom Group, Inc. Folded multiple bandpass filter with various couplings
CN1652392A (zh) * 2004-02-03 2005-08-10 株式会社Ntt都科摩 滤波器
CN103166593A (zh) * 2011-12-14 2013-06-19 矽品精密工业股份有限公司 交错耦合带通滤波器
CN107732390A (zh) * 2017-10-20 2018-02-23 中电科技集团重庆声光电有限公司 一种电磁混合耦合腔体滤波器
CN108539337A (zh) * 2018-04-09 2018-09-14 浙江嘉科电子有限公司 一种新型交叉耦合薄膜低通滤波器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110201A (ja) * 1982-12-15 1984-06-26 Nippon Dengiyou Kosaku Kk コムライン型帯域通過ろ波器の製法
DE3329057A1 (de) * 1983-08-11 1985-02-28 Siemens AG, 1000 Berlin und 8000 München Koaxialleitungs-, kammleitungs- oder interdigitalfilter mit wenigstens vier resonatoren
JP5675449B2 (ja) * 2011-03-11 2015-02-25 東光株式会社 誘電体導波管フィルタ
DE102016104608A1 (de) * 2016-03-14 2017-09-14 Kathrein-Werke Kg Koaxialfilter in Rahmenbauweise
CN112385078B (zh) * 2018-07-02 2022-03-01 株式会社村田制作所 电介质波导管滤波器
CN111446524B (zh) 2019-01-17 2022-04-08 罗森伯格技术有限公司 一种单层交叉耦合滤波器
US11437691B2 (en) * 2019-06-26 2022-09-06 Cts Corporation Dielectric waveguide filter with trap resonator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216448A (en) * 1977-01-21 1980-08-05 Nippon Electric Co., Ltd. Microwave distributed-constant band-pass filter comprising projections adjacent on capacitively coupled resonator rods to open ends thereof
US5410284A (en) * 1992-12-09 1995-04-25 Allen Telecom Group, Inc. Folded multiple bandpass filter with various couplings
CN1652392A (zh) * 2004-02-03 2005-08-10 株式会社Ntt都科摩 滤波器
CN103166593A (zh) * 2011-12-14 2013-06-19 矽品精密工业股份有限公司 交错耦合带通滤波器
CN107732390A (zh) * 2017-10-20 2018-02-23 中电科技集团重庆声光电有限公司 一种电磁混合耦合腔体滤波器
CN108539337A (zh) * 2018-04-09 2018-09-14 浙江嘉科电子有限公司 一种新型交叉耦合薄膜低通滤波器

Also Published As

Publication number Publication date
US20220069427A1 (en) 2022-03-03
US11799181B2 (en) 2023-10-24
EP3972047A4 (en) 2022-12-21
EP3972047A1 (en) 2022-03-23

Similar Documents

Publication Publication Date Title
CN111952700B (zh) 一种交叉耦合滤波器
CN111446524B (zh) 一种单层交叉耦合滤波器
US11973255B2 (en) Cross-coupled filter
US6549102B2 (en) Quasi dual-mode resonator
CN207353438U (zh) 电磁混合耦合腔体滤波器
CN210182541U (zh) 一种交叉耦合滤波器
CN115911790A (zh) 滤波器
WO2014029263A1 (zh) 一种宽带腔体滤波器
WO2020227919A1 (zh) 一种交叉耦合滤波器
CN112542665B (zh) 一种多模介质滤波器和多模级联滤波器
KR20170019876A (ko) 무선 주파수 필터의 공진기
CN112350038B (zh) 一种交叉耦合滤波器
JP3480381B2 (ja) 誘電体共振器装置、誘電体フィルタ、複合誘電体フィルタ装置、誘電体デュプレクサおよび通信装置
KR101101745B1 (ko) 트리플 모드를 이용한 고감도 유전체 공진기 조립체
CN108011162A (zh) 一种混合耦合结构的介质滤波器
CN116613495A (zh) 钣金谐振滤波器
CN117937081A (zh) 一种双模滤波器
WO2020147064A1 (zh) 一种单层交叉耦合滤波器
JP2002359502A (ja) 誘電体共振器バンドパスフィルタ及び半同軸共振器バンドパスフィルタ
CN209515955U (zh) 一种线型阵列滤波器
JPWO2020179046A1 (ja) 共振器結合構造及び周波数フィルタ
JP3508224B2 (ja) 誘電体共振器装置
CN215579000U (zh) 一种宽带低频天线合路器
WO1999018630A1 (en) Slot line band pass filter
CN202333095U (zh) 一种带阻滤波器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19928759

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2019928759

Country of ref document: EP

Effective date: 20211213

WWW Wipo information: withdrawn in national office

Ref document number: 2019928759

Country of ref document: EP