WO2017095035A1 - 크로스 커플링 노치 구조를 구비한 캐비티 타입의 무선 주파수 필터 - Google Patents
크로스 커플링 노치 구조를 구비한 캐비티 타입의 무선 주파수 필터 Download PDFInfo
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- WO2017095035A1 WO2017095035A1 PCT/KR2016/012754 KR2016012754W WO2017095035A1 WO 2017095035 A1 WO2017095035 A1 WO 2017095035A1 KR 2016012754 W KR2016012754 W KR 2016012754W WO 2017095035 A1 WO2017095035 A1 WO 2017095035A1
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- conductor pattern
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/02—Coupling devices of the waveguide type with invariable factor of coupling
- H01P5/022—Transitions between lines of the same kind and shape, but with different dimensions
- H01P5/024—Transitions between lines of the same kind and shape, but with different dimensions between hollow waveguides
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- 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
- H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
Definitions
- the present invention relates to a radio frequency filter for use in a wireless communication system, and more particularly to a cavity type radio frequency filter having a cross coupling notch structure.
- Cavity-type radio frequency filters generally have a plurality of housing spaces, ie, cavities, such as cuboids through a metal housing, and have a dielectric resonance inside each cavity, for example.
- a high frequency resonance is generated by providing a resonance element (DR) or a resonance element composed of a metal resonance rod.
- DR resonance element
- a structure may be employed in which resonance is generated in the shape of the cavity itself without the provision of the dielectric resonant element.
- a cover for shielding the open surface of the cavity is usually provided on the upper part of the cavity structure, and the cover is a tuning structure for tuning the filtering characteristics of the radio frequency filter.
- a tuning screw and a nut for fixing the tuning screw may be installed.
- Korean Patent Laid-Open Publication No. 10-2004-100084 name: "radio frequency filter”
- Korean Patent Laid-Open Publication No. 10-2004-100084 name: "radio frequency filter”
- published by the present applicant published on December 02, 2004, the inventor: Park Jong-kyu and two others
- the inventor Park Jong-kyu and two others
- Such a cavity-type radio frequency filter is used for the transmission and reception of a radio signal in a wireless communication system, and is particularly representatively applied to a base station or a repeater in a mobile communication system.
- Insertion loss refers to the power dissipated as the signal passes through the filter
- skirt characteristic refers to the steepness of the passband and stopband of the filter. Insertion loss and skirt characteristics are traded off with each other according to the number of orders of the filter. The higher the number of stages of the filter, the better the skirt characteristics but the worse the insertion loss.
- a method of forming notches is mainly used to improve the skirt characteristics of the filter without increasing the number of stages of the filter.
- the most common way to form a notch is the cross coupling method.
- the cross-coupling notch structure usually has a metal workpiece, such as a metal rod, which forms capacitance coupling between the resonant elements of two cavities that are not circuitally continuous. These metal bars are installed to penetrate the inner wall separating the two cavities. At this time, in order to electrically isolate the metal bar from the inner wall, the outside of the metal bar is wrapped in a support of a dielectric material (not shown) such as Teflon and then coupled to the inner wall. At this time, the portion where the metal bar is installed in the inner wall may be formed in a through-hole structure.
- a metal workpiece such as a metal rod
- US Patent No. 6,342,825 named “Bandpass filter having tri-section” of K & L Microwave), inventor: Rafi Hershtig, Patent Date: 2002 January 29
- US Patent No. 6,836,198 named “Adjustable capacitive coupling structure", inventor: Bill Engst, dated December 28, 2004) of RADIO FREQUENCY SYSTEMS. Can be.
- the notch structure using the cross-coupling method can be almost applied even when the small or ultra small cavity type filter is applied to the small or ultra small base station.
- the distance between the resonance element and the metal rod should be designed very close.
- machining tolerances of, for example, ⁇ 0.03 to 0.05 mm that are generally used in metal processing it is very difficult to accurately implement so that the distance between the resonance element and the metal rod corresponds to the required coupling amount, As a result, the variation in the amount of cross coupling between products becomes severe.
- the cross coupling notch structure applied to a small or ultra small filter when the designed structure is to be realized as a real product, when manufacturing and installing a metal rod (and resonant elements) of the cross coupling structure Requires very high machining precision. For example, a processing tolerance of about 0.01 mm or less may be required in the gap between the metal rod and the resonant elements.
- very precise machining tolerances when very precise machining tolerances are required, the difficulty of machining operations is increased, and the processing time is long, which results in an increase in processing costs and a low production yield, which makes production difficult.
- an object of some embodiments of the present invention is to provide a cavity type radio frequency filter having a cross coupling notch structure that can be more compact and lighter.
- Another object of the present invention is to provide a cavity type radio frequency filter having a cross coupling notch structure that is simpler, easier to fabricate, and has a stable structure, thereby providing stable notch characteristics. Is in.
- a cavity type radio frequency filter having a cross coupling notch structure;
- a housing having a hollow inside and having an open surface on one side to have a plurality of cavities;
- a cover for shielding an open surface of the housing;
- a plurality of resonating elements positioned in the hollow of the housing;
- a notch substrate provided for cross coupling between at least two resonator elements of the plurality of resonator elements;
- the notch substrate includes: a main substrate of a non-conductive material having a first coupling structure and a second coupling structure respectively mechanically coupled to the at least two resonating elements;
- the conductive line may include a first sub conductor pattern electrically connected to a support of the first resonating element in the first coupling structure of the main substrate, and the second resonant element in the second coupling structure of the main substrate. It may include a second sub conductor pattern electrically connected to the support.
- the first coupling structure and the second coupling structure may form through-holes that are mechanically coupled to each other by being fitted into the supports of the at least two resonator elements.
- a notch tuning pin for tuning the notch characteristic to a portion corresponding to the notched substrate is coupled through a notch tuning through hole, and the main substrate of the notched substrate is formed at a portion corresponding to the notch tuning pin.
- a tuning hole structure for forming a through hole having a size corresponding to the lower end of the notch tuning pin may be formed.
- the inner surface of the through hole of the first coupling structure and the second coupling structure of the main substrate may be formed with a conductive metal film, respectively.
- the first sub conductor pattern and the second sub conductor pattern are formed on different surfaces of the main substrate, respectively, and a first end of the first sub conductor pattern is connected to an inner surface of the through hole of the first coupling structure.
- the first end of the second sub conductor pattern may be connected to an inner surface of the through hole of the second coupling structure.
- the first end of the first sub conductor pattern and / or the second sub conductor pattern surrounds at least a portion of a region forming the through hole of the first coupling structure and is spaced apart from the through hole of the first coupling structure. It may be formed in a shape to maintain the distance.
- the second end of the first sub conductor pattern and the second end of the second sub conductor pattern may be configured to transmit signals in a non-contact coupling manner or may be directly connected to each other.
- the notch substrate has a structure for cross-coupling a third resonator element, the first resonator element, and the second resonator element among the plurality of resonant elements, and the main substrate of the notched substrate is one of the plurality of resonant elements.
- a third coupling structure for forming a through hole to be mechanically coupled in a form of being fitted to a support of the third resonator device, wherein the conductive line receives the signal of the first resonator device or the second resonator device.
- 3 may include a conductive line for transmitting in a non-contact coupling manner to the resonator element.
- the cavity type radio frequency filter having a notch structure provides a notch structure that is more compact and lighter, and in particular, simpler, easier to manufacture, and stable structure. Since it can provide a notch structure that can give a stable notch characteristics.
- FIG. 1 is a partially separated perspective view of a cavity type radio frequency filter having a cross coupling notch structure according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a portion A of the radio frequency filter of FIG.
- 3A and 3B are cross-sectional views taken along line AA ′ of FIG. 2.
- FIG. 4A and 4B are detailed perspective views of the notched substrate of FIG.
- 5A and 5B are perspective views of some variations of the notched substrate of FIG. 1.
- FIG. 6 is a perspective view of a notch substrate that can be applied to a cavity type radio frequency filter having a cross coupling notch structure according to a second embodiment of the present invention.
- FIGS. 7A and 7B are schematic diagrams of a notch substrate applicable to a cavity type radio frequency filter having a cross coupling notch structure according to a third embodiment of the present invention.
- FIG. 8 is a perspective view of a notch substrate applicable to a cavity type radio frequency filter having a cross coupling notch structure according to a fourth embodiment of the present invention.
- FIG. 9 is a perspective view of a notch substrate applicable to a cavity type radio frequency filter having a cross coupling notch structure according to a fifth embodiment of the present invention.
- FIG. 10 is a partially separated perspective view of a cavity type radio frequency filter having a cross coupling notch structure according to a sixth embodiment of the present invention.
- FIG. 11 is a detailed perspective view of the notched substrate of FIG. 10.
- a cavity type radio frequency filter having a notch structure according to a first embodiment of the present invention has a hollow inside and a plurality of cavities blocked from the outside (7 in the example of FIGS. 1 and 5).
- the enclosure forms seven cavities, and includes a housing 20 having one side (for example, an upper side) open and a cover 10 for shielding the open surface of the housing 20.
- the cover 10 and the housing 20 may have a structure that is coupled by laser welding or soldering, or may be coupled by a screw coupling method by a fixing screw (not shown).
- the housing 20 and the cover 10 may be made of a material such as aluminum (alloy), and may be plated with silver or copper on at least a surface forming a cavity to improve electrical characteristics.
- the resonant elements may also be made of a material such as aluminum (alloy) or iron (alloy) and may be plated with silver or copper.
- FIG. 1 illustrates an example in which seven cavity structures, for example, are connected in multiple stages in the housing 20. That is, it can be seen that the seven cavity structures are sequentially connected.
- Each cavity of the housing 20 is provided with resonating elements 31, 32, 33, 34, 35, 36. 37 at the center thereof.
- a coupling window which is a connection passage structure, is formed between the cavity structures having the sequential connection structure with each other.
- the coupling window may be formed in a shape in which a predetermined portion is removed at a predetermined size at a portion corresponding to the partition walls 201, 202, 203, 204, and 205 of the cavity structure.
- the respective resonating elements 31, 32, 33, 34, 34, 35, 36, 37 may have the same structure.
- the resonators are shown as having the same structure all.
- the first to seventh resonator elements 31 to 37 may each include a flat plate having a circular flat plate shape, and a structure of a support for fixing and supporting the flat plate, and each support may be formed inside the cavity. It is fixedly installed on the bottom surface, that is, the housing 20.
- the detailed structures of the flat plate and the support of the resonator elements 31 to 37 may have various structures according to the design conditions of the filter, and resonators of different detailed structures may be mixed.
- first to seventh recessed structures 101, 102, 103, 104, 105, 106, and 107 for frequency tuning may be formed in correspondence with the resonant elements 31 to 37 of each cavity structure. have.
- a plurality of coupling tuning screw holes 111 may be formed at a portion of the housing 20 corresponding to the coupling window, which is a connection passage structure of each cavity structure.
- the coupling tuning screw 41 for coupling coupling is inserted into the coupling tuning screw hole 111 to an appropriate depth so that the coupling tuning operation may be performed.
- the coupling tuning screw 41 may be additionally fixed using a separate adhesive such as an epoxy resin.
- the input terminal 21 and the output terminal 22 of the corresponding radio frequency filter may be installed through a through hole or the like that may be formed on one side of the housing 20.
- the input terminal 21 and the first resonator element 31 are coupled, and the output terminal 22 is connected to the seventh resonator element 37.
- the extension line (not shown) of the input terminal 21 and the support of the first resonator element 31 may be coupled in a direct connection or in a non-contact coupling manner.
- the structure of the cover 10 may have a structure similar to that applied to a radio frequency filter having a conventional cavity structure, for example, the Korean Patent Publication No. 10-2014- elected by the present applicant It may have a structure similar to the structure disclosed in 0026235 (name: "radio frequency filter with a cavity structure", published date: March 05, 2014, inventor: Nam Nam Park and two others).
- Korean Patent Laid-Open Publication No. 10-2014-0026235 proposes a simple and simplified filter structure capable of frequency tuning without employing a fastening structure of a tuning screw and a fixing nut, which are more general structures.
- one or a plurality of recessed structures at positions corresponding to the resonant elements 31 to 37 are formed.
- frequency tuning is possible by forming a plurality of dot peen structures by rudder or pressing by rudder pins of external rudder equipment.
- the cavity structure formed in the housing 20 and the cover 10, and the structure of the resonator elements 31 to 37 in the cavity is conventional and It can be a relatively similar structure except that it can be implemented in a smaller size in comparison.
- the notch structure and the installation structure thereof according to the embodiments of the present invention have an improved structure compared to the conventional.
- a notch substrate 51 is provided for cross coupling between the fourth resonator element 34 and the sixth resonator element 36 as an example. It is becoming.
- the partition wall 204 that separates the cavity of the fourth resonator element 34 from the cavity of the sixth resonator element 36 is formed with a window in which a suitable portion is removed so that the corresponding notch substrate 51 can be installed.
- the cover 10 is formed with a notch tuning through hole 121 to which the notch tuning pin 61 is coupled to tune the notch characteristic to a portion corresponding to the notch substrate 51.
- a notch tuning pin 41 set to an appropriate length for notch tuning is inserted into the notch tuning through hole 121 so that the notching characteristic can be tuned in conjunction with the notch substrate 51.
- the notch tuning pin 61 may be formed in a screw shape as a whole, and may have a structure that is coupled to the notch tuning through-hole 121 through a screw coupling.
- the notch tuning pin 61 is made of a conductive metal material such as aluminum (alloy) or brass (alloy), and silver plating may be formed.
- FIG. 2 is a cross-sectional view of a portion A shown by a dotted square box of the radio frequency filter of FIG. 1, including a notch substrate 51, a fourth resonance element 34, a sixth resonance element 36, and notch tuning. Relevant sites, such as pin 61, are shown in greater detail.
- 3A and 3B are cross-sectional views taken along line AA ′ of FIG. 2, and FIG. 3A shows a structure including a notch tuning pin 61, and FIG. 3B shows a structure without a notch tuning pin 61.
- do. 4A and 4B are detailed perspective views of the notched substrate 51 of FIG. 1, and FIG. 4A shows a perspective structure of the notched substrate 51 viewed from the first side (eg, upper side), and FIG. 4B is a notched substrate. A perspective structure is shown with 51 viewed from the second side (eg lower side).
- the notch substrate 51 may have a printed circuit board (PCB) structure as a whole.
- PCB printed circuit board
- the conductive lines 511 and 512 are formed using a conductor pattern forming process in a general PCB substrate manufacturing process.
- the main substrate 513 may be implemented as a single layer or a multilayer substrate of a frame retardant (FR) series or a composite epoxy material (CEM) series similar to a general PCB substrate.
- FR frame retardant
- CEM composite epoxy material
- the main substrate 513 is mechanically coupled to at least two resonant elements, that is, the fourth resonator element 34 and the sixth resonator element 36 in the example of FIGS. 2 to 4B, respectively. ), That is, in the example of FIGS. 2 to 4B, respectively, for example, a first coupling structure 51a and a second coupling structure 51c in the form of a ring, each forming a through hole. Is formed.
- the support hole 342 of the fourth resonator element 34 is fitted into the through hole portion of the first coupling structure 51a, and the sixth resonator element is inserted into the through hole portion of the second coupling structure 51c.
- the support 362 of the 36 is coupled in the form fitted.
- the conductive lines 511 and 512 are electrically connected to at least two resonant elements, that is, the fourth resonator element 34 and the sixth resonator element 36 in the example of FIGS. 2 to 4B.
- the conductive pattern is formed on the upper and / or lower surface of the main substrate 513.
- the conductive lines 511 and 512 are formed on, for example, the upper surface of the main substrate 513 and are connected to the support 342 of the fourth resonator element 34 in electrical contact with the first sub conductor pattern 511.
- a second sub conductor pattern 512 formed on the bottom surface of the main substrate 513 and electrically connected to the support 362 of the sixth resonance element 36.
- the conductor pattern 511 and the second sub conductor pattern 512 are configured to transmit signals in a non-contact coupling manner with each other.
- the inner surface of the through-hole of the first coupling structure 51a of the main substrate 513 may be configured such that a conductive metal film is formed, similarly to the structure of the via hole formed on the PCB substrate.
- One end (first end) of the first sub conductor pattern 511 may be configured to be connected to an inner surface of the through-hole of the first coupling structure 51a.
- a conductive metal film may be formed on the inner surface of the through hole of the second coupling structure 51c, and one end (first end) of the second sub conductor pattern 52 may be connected thereto.
- the other end (second end) of the first sub conductor pattern 511 and the other end (second end) of the second sub conductor pattern 512 are, for example, the main substrate 513 therebetween. Sites that face each other at a central point of the substrate 513 are formed to transmit signals in a non-contact coupling manner.
- the main substrate 513 may be additionally provided at a portion corresponding to the lower end of the notch tuning pin 61 so that the lower end of the notch tuning pin 61 may be installed in an insertable form.
- a tuning hole structure 51b may be formed to form a through hole having a size corresponding to that of the lower end.
- the tuning hole structure 51b of the main substrate 513 may be formed at a central point of the main substrate 513.
- portions of the first sub conductor pattern 511 and the second sub conductor pattern 512 facing each other may be appropriately formed on the upper and lower surfaces of the main substrate 513 in the peripheral region of the tuning hole structure 51c.
- This structure is a structure in which the notch tuning pin 61 for notch tuning is installed at a point where the first sub conductor pattern 511 and the second sub conductor pattern 512 are non-contact-coupled with each other. Tuning can be done more effectively.
- the fourth resonance element 34 and the sixth are respectively formed in the through holes formed in the first coupling structure 51a and the second coupling structure 51c of the main substrate 513.
- the soldering operation may be additionally performed on the coupling portion. Accordingly, the coupling site is mechanically and electrically coupled more stably, so that the notch substrate 51 is finally fixed.
- the notch tuning pin 61 is coupled to the notch tuning through hole 121 of the cover 10 as shown in FIG. 1, and thus, the lower end of the notch tuning pin 61. Is provided in a form that can be inserted into the tuning hole structure 51b formed in the notched substrate 51.
- the notch tuning pin 61 may be replaced by a notch tuning pin 61 designed to have a different length in advance, or may be cut and reinstalled so that the length of the lower end of the notch tuning pin 61 is a proper length.
- substrate 51 with 61, etc. can also be adjusted.
- a notch substrate 51 applied to the wireless wave filter according to the first embodiment of the present invention may be constructed and installed.
- a notch substrate 51 is basically a PCB.
- the fabrication process may be implemented in a very simple and precise form compared to a notch structure using a conventional metal rod or the like.
- two resonant elements for example, fourth and sixth resonant elements 34 and 36, which are intended to cross-couple to the first and second coupling structures 51a and 51c forming the through holes of the notched substrate 51. Since the notch substrate 51 can be simply installed in the form of being fitted to the support bases 342 and 362, it is very easy to install the notch substrate 51 while eliminating the problems caused by the conventional machining and assembly tolerances. It becomes possible.
- the notch substrate 51 (and the notch substrate according to other embodiments of the present invention described below) according to the first embodiment of the present invention illustrated in FIGS. 1 to 4A may be a main substrate 513 or a conductive material.
- Various modifications or variations can be made in detailed features, such as the shape and size of the tracks 511, 512.
- a lead injecting groove 51d for solder is additionally added to an appropriate portion of the first coupling structure 51a forming the through hole. Formation is shown.
- the solder lead injecting groove 51d for soldering is easier to inject and apply solder lead during soldering and support of the first coupling structure 51a and the resonant element coupled thereto.
- the solder lead injection groove 51d may also be formed in the second coupling structure 51c of the notched substrate 51.
- a cutout portion 51e is formed in which a portion of the first coupling structure 51a forming the through hole is cut.
- the first coupling structure 51a and / or the second coupling structure 51c of the notched substrate 51 may be configured in the form of a complete ring without a broken portion, or may be configured in the form of a ring in which a portion is cut. have.
- FIG. 6 is a perspective view of a notch substrate 52 that can be applied to a cavity type radio frequency filter having a cross coupling notch structure according to a second embodiment of the present invention.
- the notched substrate 52 according to the second embodiment of the present invention may have a first coupling structure that forms through-holes, similarly to the structure of the first embodiment shown in FIGS. 2 to 4B.
- conductive lines 521 and 522 are formed on the same surface of the main substrate 523. As shown in FIG. That is, the conductive lines 521 and 522 are formed such that, for example, one end (first end) of the metal film formed in the through hole region of the first coupling structure 52a of the main substrate 523 is in electrical contact. A second sub conductor pattern 521 and a metal film formed in the through hole region of the second coupling structure 52c of the main substrate 523 and one end (first end) to be in electrical contact with each other.
- the sub conductor pattern 522 may be formed, and the first and second sub conductor patterns 521 and 522 may be formed on the upper surface of the main substrate 523, for example.
- the other end (second end) of the first sub conductor pattern 521 and the other end (second end) of the second sub conductor pattern 522 are, for example, slightly different from each other at a central point of the main substrate 523.
- Opposing sites are formed and configured to transmit signals in a mutually non-contact coupling manner.
- a tuning hole structure 52b may be formed on the main substrate 523, and the other end of the first sub conductor pattern 521 may be formed. Some portions on the second end side and some portions on the other end (second end) side of the second sub conductor pattern 522 may be formed to surround the tuning hole structure 52b.
- FIG. 7A and 7B are schematic diagrams of a notch substrate 53 which can be applied to a cavity type radio frequency filter having a cross coupling notch structure according to a third embodiment of the present invention.
- FIG. 7B A part of the side structure showing the installation state of the notched substrate 53 is shown in FIG. 7B.
- the notched substrate 53 according to the third embodiment of the present invention has a first coupling structure 53a that forms through-holes, respectively, similarly to the structure of the second embodiment illustrated in FIG. 6.
- the first sub conductor pattern 531 and the second sub conductor pattern 532 constituting the conductive lines 531 and 532 are formed on the same surface of the main substrate 533.
- the first coupling structure 53a and the second coupling structure 53c of the main substrate 533 each have a through hole shape for coupling with a support of the resonant element.
- no metal film is formed.
- one end (first end) of the first sub conductor pattern 531 is at least a part of the region forming the through-hole of the first coupling structure 53a on the upper surface of the main substrate 533 (see FIG. 7A). In the example, all are formed in the form of surrounding.
- the portion surrounding the through hole in the first sub conductor pattern 531 is not directly contacted with the support of the resonating element coupled to the through hole so that the signal is transmitted in a non-contact coupling manner.
- the structure is formed to maintain the separation distance from the through-hole.
- one end (first end) of the second sub conductor pattern 532 surrounds at least a part of the region forming the through hole of the second coupling structure 53c on the upper surface of the main substrate 533. It is formed in a structure that maintains a separation distance from the through-hole.
- first sub conductor pattern 531 and the second sub conductor pattern 532 are not configured to transmit signals in a non-contact coupling manner, but are directly connected to each other and integrally formed. That is, the other end (second end) of the first sub conductor pattern 531 and the other end (second end) of the second sub conductor pattern 532 are formed at, for example, a central point of the main substrate 533. The parts facing each other may be directly connected to each other while being formed to surround the dragon hole structure 53b.
- the support of the resonating element is fitted into the through-holes formed in the first coupling structure 53a and the second coupling structure 53c, respectively. It can be seen that the structure is coupled, but the coupling site is not soldered, that is, the support of each resonator element is a non-contact coupling method with the first and second sub conductor patterns 531 and 532 of the notched substrate 53. It is configured to pass a signal to.
- a support protrusion 341a of an appropriate shape may be formed on the support of each resonator element 34 so as to more stably support the associated notched substrate 53.
- the notch substrate 54 may have a first coupling structure 54a that forms through-holes, similarly to the structure of the third exemplary embodiment illustrated in FIG. 7. ) And a main substrate 543 having a second coupling structure 54c and conductive lines 541 and 542 formed on the main substrate 543.
- the first sub conductor pattern 541 and the second sub conductor pattern 542 constituting the conductive lines 541 and 542 are formed on the same surface of the main substrate 543.
- the first sub conductor pattern 531 and the second sub conductor pattern 532 are formed in a shape surrounding the tuning hole structure 54b formed at the central point of the main substrate 543, and the portions facing each other are directly formed. It is configured to be connected to.
- portions of the first coupling structure 54a and the first sub conductor pattern 541 associated with the first coupling structure 54a are the same as those of the structure shown in FIG. 7A.
- the second coupling structure 54b and the second sub-conductor pattern 642 have a structure in which a signal is transmitted in a non-contact coupling manner without being directly in contact with the support of the corresponding resonant element.
- the portion related to 54c has a structure in which a signal is directly contacted with a support of a corresponding resonant element.
- the coupling structure of the first and second coupling structures and the first and second sub-conductor patterns may be designed for cross-coupling,
- the structures of the various embodiments may be selectively configured to be mixed with each other as appropriate.
- the first and second sub conductor patterns may be configured to transmit signals in a non-contact coupling manner without being directly connected to each other. Can be.
- the first and second sub conductor patterns may be formed on different surfaces of the main substrate.
- the notched substrate 55 according to the fifth embodiment of the present invention may have a first coupling structure that forms through-holes, similarly to the structure of the first embodiment illustrated in FIGS. 2 to 4B. And a main substrate 553 having a 55a) and a second coupling structure 55c and a tuning hole structure 55b.
- conductive lines 551 formed on different surfaces of the main substrate 553 and composed of a first sub conductor pattern 551 and a second sub conductor pattern 552 which transmit signals in a non-contact coupling manner. , 552).
- notch substrate 51 of the first embodiment shown in FIGS. 2 to 4 b is generally formed in a '-' shape
- the notched substrate according to the fifth embodiment shown in FIG. 9 is illustrated.
- Reference numeral 55 is a form in which at least a portion is bent, for example, it is shown that is formed in the 'L' shape as a whole.
- the notched substrate according to some embodiments of the present disclosure may be formed in various shapes having an arc shape or a plurality of bent portions, depending on the filter design.
- the notch substrate of the present invention is implemented in a PCB structure, it can be produced simply without additional processing or additional precision work required.
- the radio frequency filter according to the sixth embodiment of the present invention is mostly the same as the structure shown in FIG. 1, except that the notch substrate 56 is a notch structure according to the sixth embodiment of the present invention.
- An example is shown between the fourth resonator element 34 and the sixth resonator element 36 and between the second resonator element 32 and the fourth resonator element 34 for cross coupling.
- the notch is formed in the partition 204 between the cavity of the fourth resonance element 34 and the sixth resonance element 36 and the partition 202 between the second resonance source 32 and the fourth resonance element 34.
- a window is formed in which a suitable portion is removed so that the substrate 56 can be installed.
- the cover 10 includes a first notch tuning pin 61 in order to tune notch characteristics between the fourth resonator element 34 and the sixth resonator element 36 at a portion corresponding to the notch substrate 56.
- a first notch tuning through hole 121 is formed to be coupled, and a first notch tuning through hole 121 is formed to tune the notch characteristic between the second resonator element 32 and the fourth resonator element 34 at a portion corresponding to the notch substrate 56.
- the second notch tuning through hole 122 to which the second notch tuning pin 62 is coupled is formed.
- FIG. 11 is a detailed perspective view of the notched substrate 56 of FIG. 10.
- the notched substrate 56 may include a main substrate 565, a first surface (eg, an upper surface), and / or a second surface of the main substrate 565. It may be configured to include conductive lines (561, 562, 563, 564) formed on the surface (for example, the lower surface).
- the main substrate 565 has at least three resonant elements, that is, in the example of FIG. 11, the support 342 of the fourth resonator element 34, the support 362 and the second resonator element of the sixth resonator element 36.
- the first coupling structure 56a, the second coupling structure 56c, and the third coupling structure 56d to mechanically couple to the support 322 of the 32 to fix the main substrate 563 to be fixed. Is formed.
- the conductive lines 561, 562, 563, and 564 are formed on, for example, a first surface of the main substrate 563, and are connected to the first sub conductor electrically connected to the support 342 of the fourth resonance element 34.
- a second sub conductor pattern 562 formed on the bottom surface of the main substrate 563 and electrically connected to the support 362 of the sixth resonator element 36.
- the second sub conductor patterns 561 and 562 are configured to transmit signals in a non-contact coupling manner with the main substrate 565 therebetween at a portion of the first tuning hole structure 51b formed on the main substrate 565. do.
- the conductive lines 561, 562, 563, and 564 may be formed on, for example, a top surface of the main substrate 563, and may be electrically connected to the support 322 of the second resonator element 32.
- the third and fourth sub conductor patterns 563 and 564 are configured to transmit signals in a non-contact coupling manner at portions of the second tuning hole structure 52b formed on the main substrate 565.
- illustration of the second sub conductor pattern 562 and the fourth sub conductor pattern 564 formed on the lower surface of the main substrate 565 is omitted.
- the notch substrate 56 according to the sixth embodiment of the present invention has a notch substrate 51 according to the first embodiment shown in FIGS. 1 to 4B. It can be seen that the structure of the structure is formed in a double.
- the notched substrate according to some other embodiments of the present invention may integrally form a plurality of notched structures according to the filter design.
- additional processing or additional precision work may not be required.
- the plurality of coupling structures of the main substrate, the structures of the plurality of conductor patterns, and the like are cross-coupled in design conditions.
- the structure of the various embodiments may be selectively configured to be mixed with each other according to the installation conditions and the like.
- a cavity type radio frequency filter having a notch structure may be configured.
- the scope of the present invention should be determined by the equivalents of the claims and the claims, rather than by the embodiments described.
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Abstract
Description
Claims (15)
- 크로스 커플링 노치 구조를 구비한 캐비티 타입의 무선 주파수 필터에 있어서,복수의 캐비티(cavity)를 갖기 위해 내부가 중공이고 일측으로 개방면을 갖는 하우징과;상기 하우징의 개방면을 차폐하는 커버와;상기 하우징의 상기 중공에 위치하는 복수의 공진소자와;상기 복수의 공진소자 중 적어도 두 개의 공진소자 사이에 크로스 커플링을 위해 설치되는 노치 기판을 포함하며;상기 노치 기판은,상기 적어도 두 개의 공진소자와 각각 기구적으로 결합하는 제1결합 구조 및 제2결합 구조를 구비한 비전도성 재질의 메인 기판과;상기 메인 기판에 형성되는 도체 패턴으로 구현되며, 상기 적어도 두 개의 공진소자 중 제1 공진소자의 신호를 상기 적어도 두 개의 공진소자 중 제2 공진소자로 비접촉 커플링 방식으로 전달하는 전도성 선로를 포함하는 것을 특징으로 하는 무선 주파수 필터.
- 제1항에 있어서, 상기 전도성 선로는,상기 메인 기판의 상기 제1결합 구조에서 상기 제1 공진소자의 지지대와 전기적으로 연결되는 제1서브 도체 패턴과,상기 메인 기판의 상기 제2결합 구조에서 상기 제2 공진소자의 지지대와 전기적으로 연결되는 제2서브 도체 패턴을 포함함을 특징으로 하는 무선 주파수 필터.
- 제2항에 있어서,상기 제1결합 구조 및 제2결합 구조는 상기 적어도 두 개의 공진소자의 지지대에 각각 끼워지는 형태로 기구적으로 결합하는 관통형 홀을 형성함을 특징으로 하는 무선 주파수 필터.
- 제3항에 있어서, 상기 커버에는,상기 노치 기판과 대응하는 부위에 노치 특성을 튜닝하기 위한 노치 튜닝 핀이 노치 튜닝용 관통 홀을 통해 결합되며,상기 노치 기판의 메인 기판에는 상기 노치 튜닝 핀과 대응되는 부위에서, 상기 노치 튜닝 핀의 하단부와 대응되는 크기의 관통형 홀을 형성하는 튜닝용 홀 구조가 형성됨을 특징으로 하는 무선 주파수 필터.
- 제4항에 있어서,상기 제1서브 도체 패턴과 상기 제2서브 도체 패턴은 상기 메인 기판의 상기 노치 튜닝용 홀 구조가 형성되는 부위에서 서로 비접촉 커플링 방식으로 신호를 전달하도록 구성됨을 특징으로 하는 무선 주파수 필터.
- 제3항에 있어서,상기 메인 기판의 제1결합 구조 및 제2결합 구조의 관통형 홀의 내면은 각각 전도성 금속 피막이 형성되며,상기 제1서브 도체 패턴과 상기 제2서브 도체 패턴은 상기 메인 기판에서 서로 다른 면에 각각 형성되며,상기 제1서브 도체 패턴의 제1단은 상기 제1결합 구조의 관통형 홀의 내면과 연결되는 형태로 구성되며,상기 제2서브 도체 패턴의 제1단은 상기 제2결합 구조의 관통형 홀의 내면과 연결되는 형태로 구성되며,상기 제1서브 도체 패턴의 제2단과, 상기 제2서브 도체 패턴의 제2단은 상기 메인 기판을 사이에 두고 서로 마주보는 부위가 형성되어 상호 비접촉 커플링 방식으로 신호를 전달하도록 구성됨을 특징으로 하는 무선 주파수 필터.
- 제3항에 있어서,상기 메인 기판의 제1결합 구조 및 제2결합 구조의 관통형 홀의 내면은 각각 전도성 금속 피막이 형성되며,상기 제1서브 도체 패턴과 상기 제2서브 도체 패턴은 상기 메인 기판에서 동일한 면에 각각 형성되며,상기 제1서브 도체 패턴의 제1단은 상기 제1결합 구조의 관통형 홀의 내면과 연결되는 형태로 구성되며,상기 제2서브 도체 패턴의 제1단은 상기 제2결합 구조의 관통형 홀의 내면과 연결되는 형태로 구성되며,상기 제1서브 도체 패턴의 제2단 측의 일부와, 상기 제2서브 도체 패턴의 제2단 측의 일부가 상호 마주보는 부위가 형성되어 상호 비접촉 커플링 방식으로 신호를 전달하도록 구성됨을 특징으로 하는 무선 주파수 필터.
- 제3항에 있어서,상기 제1서브 도체 패턴과 상기 제2서브 도체 패턴은 상기 메인 기판에서 동일한 면에 각각 형성되며,상기 제1서브 도체 패턴의 제1단은 상기 제1결합 구조의 관통형 홀을 형성하는 영역의 적어도 일부를 둘러싸며 상기 제1결합 구조의 관통형 홀과 이격거리를 유지하는 형태로 형성되며,상기 제2서브 도체 패턴의 제1단은 상기 제2결합 구조의 관통형 홀을 형성하는 영역의 적어도 일부를 둘러싸며 상기 제1결합 구조의 관통형 홀과 이격거리를 유지하는 형태로 형성됨을 특징으로 하는 무선 주파수 필터.
- 제8항에 있어서,상기 제1서브 도체 패턴의 제2단과 상기 제2서브 도체 패턴의 제2단은 직접적으로 연결되어 일체적으로 형성됨을 특징으로 하는 무선 주파수 필터.
- 제3항에 있어서,상기 메인 기판의 제1결합 구조의 관통형 홀의 내면은 전도성 금속 피막이 형성되며,상기 제1서브 도체 패턴의 제1단은 상기 제1결합 구조의 관통형 홀의 내면과 연결되는 형태로 구성되며,상기 제2서브 도체 패턴의 제1단은 상기 제2결합 구조의 관통형 홀을 형성하는 영역의 적어도 일부를 둘러싸며 상기 제1결합 구조의 관통형 홀과 이격거리를 유지하는 형태로 형성됨을 특징으로 하는 무선 주파수 필터.
- 제10항에 있어서,상기 제1서브 도체 패턴의 제2단과 상기 제2서브 도체 패턴의 제2단은 직접적으로 연결되는 구조로 형성됨을 특징으로 하는 무선 주파수 필터.
- 제1항에 있어서,상기 노치 기판은 상기 복수의 공진소자 중 제3 공진소자와 상기 제1 공진소자 및 상기 제2 공진소자와 크로스 커플링을 하기 위한 구조를 가지며,상기 노치 기판의 메인 기판은 상기 복수의 공진소자 중 제3 공진소자와 기구적으로 결합하는 제3결합 구조를 구비하며,상기 전도성 선로는 상기 제1 공진소자 또는 상기 제2 공진소자의 신호를 상기 제3 공진소자로 비접촉 커플링 방식으로 전달하는 전도성 선로를 포함하는 것을 특징으로 하는 무선 주파수 필터.
- 제12항에 있어서,상기 제1결합 구조 및 제2결합 구조는 상기 적어도 두 개의 공진소자의 지지대에 각각 끼워지는 형태로 기구적으로 결합하는 관통형 홀을 형성하며,상기 제3결합 구조는 상기 제3 공진소자의 지지대에 끼워지는 형태로 기구적으로 결합하는 관통형 홀을 형성함을 특징으로 하는 무선 주파수 필터.
- 제1항 내지 제13항 중 어느 한 항에 있어서,상기 노치 기판 적어도 일부분이 원호 형태 또는 절곡된 형태를 가짐을 특징으로 하는 무선 주파수 필터.
- 제3항 내지 제7항 중 어느 한 항에 있어서,상기 제1결합 구조 및 상기 제2결합 구조의 상기 관통형 홀에는 솔더용 납 주입용 홈이 형성됨을 특징으로 하는 무선 주파수 필터.
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| JP2018527943A JP6522244B2 (ja) | 2015-11-30 | 2016-11-07 | クロスカップリング切欠構造を備えたキャビティタイプの無線周波数フィルタ |
| CN201680070070.1A CN108701886B (zh) | 2015-11-30 | 2016-11-07 | 具有交叉耦合槽口结构的空腔型射频滤波器 |
| EP16870931.9A EP3386027B1 (en) | 2015-11-30 | 2016-11-07 | Cavity type wireless frequency filter having cross-coupling notch structure |
| US15/990,856 US10777869B2 (en) | 2015-11-30 | 2018-05-29 | Cavity type wireless frequency filter having cross-coupling notch structure |
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| KR1020150168430A KR101756124B1 (ko) | 2015-11-30 | 2015-11-30 | 크로스 커플링 노치 구조를 구비한 캐비티 타입의 무선 주파수 필터 |
| KR10-2015-0168430 | 2015-11-30 |
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| US15/990,856 Continuation US10777869B2 (en) | 2015-11-30 | 2018-05-29 | Cavity type wireless frequency filter having cross-coupling notch structure |
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| WO2017095035A1 true WO2017095035A1 (ko) | 2017-06-08 |
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| EP (1) | EP3386027B1 (ko) |
| JP (1) | JP6522244B2 (ko) |
| KR (1) | KR101756124B1 (ko) |
| CN (1) | CN108701886B (ko) |
| WO (1) | WO2017095035A1 (ko) |
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| CN115579602A (zh) * | 2022-10-25 | 2023-01-06 | 京信射频技术(广州)有限公司 | 滤波器 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108701886A (zh) | 2018-10-23 |
| EP3386027A4 (en) | 2019-07-31 |
| KR20170062804A (ko) | 2017-06-08 |
| US10777869B2 (en) | 2020-09-15 |
| JP6522244B2 (ja) | 2019-05-29 |
| JP2018535617A (ja) | 2018-11-29 |
| EP3386027B1 (en) | 2021-08-25 |
| US20180277918A1 (en) | 2018-09-27 |
| CN108701886B (zh) | 2020-03-27 |
| KR101756124B1 (ko) | 2017-07-11 |
| EP3386027A1 (en) | 2018-10-10 |
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