JPH07249904A - Dielectric resonator device - Google Patents

Abstract

PURPOSE:To easily manufacture an inexpensive and compact dielectric resonator device eliminating the necessity of a shield case and a fixing bracket and having plural resonators of various stages without requiring exclusive metal molds for the resonators. CONSTITUTION:Hole parts are respectively formed in plural dielectric resonators Ra to Rc obtained by forming internal conductors in respective dielectric blocks and forming external conductors on their outsides and a rod-like connector formed by auxiliary conductors 32 to 34 is inserted into the hole parts. Consequently the connection state among respective resonators can easily be set up by the action of the auxiliary electrodes of the connector and their dielectric substances.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric resonator device formed by integrating or combining a plurality of dielectric resonators.

[0002]

2. Description of the Related Art As a conventional example of this type, a dielectric resonance consisting of a plurality of stages of resonators is provided by providing a plurality of inner conductors inside a rectangular parallelepiped dielectric block and forming outer conductors on the outer surface. There is a device that is configured. In addition, each inner conductor formation hole is a resin-insulated coupling terminal (pin)
Each of the dielectric coaxial resonators is formed by soldering the above-mentioned coupling terminal to a conductor on the coupling substrate by using a plurality of individual dielectric coaxial resonators in which the There is one in which a dielectric resonator device is configured by coupling the spaces and projecting the signal input / output terminals from the coupling substrate.

[0003]

The former one-piece dielectric resonator device does not require a mounting bracket for mounting on a shield case or a circuit board, and is easily surface-mounted. However, in such a dielectric resonator device in which a plurality of resonators are provided in one dielectric block, it is necessary to prepare respective molds in order to manufacture different dielectric resonator devices. . Therefore, a large number of molds are required to manufacture various types of dielectric resonator devices having different characteristics, which increases the manufacturing cost. Further, since the distance between the resonators is determined by the size and shape of each mold, there is a problem that it is not easy to set the degree of coupling between the resonators. That is, for example, in a conventional dielectric resonator device having a combline structure, the setting or adjustment of the degree of coupling between the resonators and the setting or adjustment of the resonance frequency of each resonator are related to each other due to their structure. However, when one changed, the other changed, and it was not easy to set or adjust both independently.

Further, in the latter dielectric resonator device, although the resonance frequency of each dielectric coaxial resonator and the coupling degree between the resonators can be set independently, they are coupled to the dielectric coaxial resonator. A shield case and signal input / output terminals for shielding the entire circuit board and enabling mounting on the circuit board are required.

An object of the present invention is to provide a dielectric resonator device which does not require a conventional shield case or a mounting bracket, is low in manufacturing cost, is compact, and has resonators of various stages.
It can be easily manufactured without requiring a dedicated mold for the resonators of each stage number, and the resonance frequency of each resonator and the degree of coupling between the resonators can be set or adjusted independently of each other. An object is to provide a dielectric resonator device.

[0006]

A dielectric resonator device according to claim 1 of the present invention has a plurality of inner conductors formed inside a dielectric block and outer conductors formed on the outer surface of the dielectric block. In the dielectric resonator device including the dielectric resonator, a hole is formed in a dielectric block forming each dielectric resonator in a direction intersecting the axial direction of the inner conductor, and the plurality of dielectric resonators are formed. The rod-shaped combined body on which the auxiliary conductor is formed is inserted into the hole portion in a state in which are arranged.

A dielectric resonator device according to a second aspect of the present invention is the dielectric resonator device according to the first aspect, wherein the hole portion is provided at a position in contact with a part of the inner conductor, and the auxiliary conductor is connected to the inner conductor. Characterize.

A dielectric resonator device according to a third aspect of the present invention is the dielectric resonator device according to the first aspect, wherein the hole is provided in a position close to the inner conductor, and an electrostatic capacitance is formed between the auxiliary conductor and the inner conductor. It is characterized by having done.

A dielectric resonator device according to a fourth aspect is the dielectric resonator device according to the first, second or third aspect, wherein a plurality of auxiliary conductors are formed in an array on the rod-shaped coupling body, and electrostatic capacitance is provided between adjacent auxiliary conductors. It is characterized by being formed.

A dielectric resonator device according to a fifth aspect of the present invention is characterized in that, in the first, second, third, or fourth aspect, the auxiliary conductor constitutes a capacitance and / or an inductor.

A dielectric resonator device according to a sixth aspect of the present invention is the dielectric resonator device according to the fourth aspect, wherein the hole is provided at a location where the electric field energy component of the inner conductor is predominant, and between the inner conductors of adjacent dielectric resonators. Is electrically coupled via the auxiliary conductor.

A dielectric resonator device according to a seventh aspect is the dielectric resonator device according to the sixth aspect, wherein the inner conductor is provided with an open end,
The hole is provided near the open end.

The dielectric resonator device according to an eighth aspect is the dielectric resonator device according to the sixth aspect, wherein both ends of the inner conductor are short-circuited ends, and the hole is provided near a central portion of the inner conductor. To do.

A dielectric resonator device according to a ninth aspect of the present invention is the dielectric resonator device according to the fifth aspect, wherein the auxiliary conductor constitutes a phase inversion circuit.

A dielectric resonator device according to a tenth aspect of the present invention is the dielectric resonator device according to any one of the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth aspects, in which the respective dielectric resonators are arranged on a substrate. Then, the rod-shaped coupling body is inserted into the hole of each dielectric resonator.

A dielectric resonator device according to an eleventh aspect of the present invention is the dielectric resonator device according to any one of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth aspects, in which the respective dielectric resonators are joined and integrated. Then, the rod-shaped coupling body is inserted into the hole of each dielectric resonator.

A dielectric resonator device according to a twelfth aspect of the present invention is the dielectric resonator device according to the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth or eleventh aspect, in the vicinity of the opening of the hole. A signal input / output conductor is formed, and the auxiliary conductor is connected to or close to the signal input / output conductor.

[0018]

In the dielectric resonator device according to claim 1 of the present invention, each of the plurality of dielectric resonators used has an inner conductor formed inside the dielectric block, and an outer conductor formed on the outer surface of the dielectric block. Is formed, a hole is formed in the dielectric block in a direction intersecting the axial direction of the inner conductor, and a plurality of dielectric resonators are arranged. Is inserted into the hole.
With this configuration, the auxiliary conductor is located inside the dielectric resonator, and a dielectric resonator device in which a plurality of dielectric resonators and auxiliary conductors are arranged can be obtained.

In the dielectric resonator according to the second aspect, the hole is provided at a position in contact with a part of the inner conductor, and the auxiliary conductor is connected to the inner conductor. As a result, a dielectric resonator device in which the auxiliary conductor is connected to a part of the inner conductor can be obtained.

In the dielectric resonator device according to a third aspect of the present invention, the hole is provided at a position close to the inner conductor, and a capacitance is formed between the auxiliary conductor and the inner conductor. As a result, a dielectric resonator device having a capacitance formed between a part of the inner conductor and the auxiliary conductor can be obtained.

In the dielectric resonator device according to a fourth aspect, a plurality of auxiliary conductors are formed in an array on the rod-shaped coupling body,
Capacitance is formed between adjacent auxiliary conductors. As a result, a dielectric resonator device including a plurality of dielectric resonators, a plurality of auxiliary conductors, and a capacitance formed between adjacent auxiliary conductors is obtained.

In the dielectric resonator device according to the fifth aspect, the capacitance and / or the inductor are formed in a rod-shaped coupling body by the auxiliary conductor. As a result, a dielectric resonator device having a capacitance and / or an inductor provided between the dielectric resonators can be obtained.

In the dielectric resonator device according to a sixth aspect of the present invention, the hole is provided at a location where the electric field energy component of the inner conductor is predominant, and the inner conductors of the adjacent dielectric resonators are interposed by the auxiliary conductor. It is electric field coupled. With this configuration, it is possible to obtain a dielectric resonator device including a plurality of dielectric resonators in which electric fields are coupled between adjacent dielectric resonators.

In the dielectric resonator device according to the seventh aspect, the inner conductor is provided with an open end, and the hole is provided near the open end. As a result, a dielectric resonator device can be obtained in which dielectric resonators having inner conductors having open ends are field-coupled to each other.

In the dielectric resonator device according to the eighth aspect, both ends of the inner conductor are short-circuited ends, and the hole is provided near the center of the inner conductor. As a result, a dielectric resonator device including a plurality of dielectric resonators in which dielectric resonators having inner conductors whose both ends are short-circuited are field-coupled is obtained.

In the dielectric resonator device according to the ninth aspect, a phase inversion circuit is formed in the rod-shaped coupling body by the auxiliary conductor. As a result, a dielectric resonator device in which adjacent dielectric resonators are coupled by a phase inversion circuit can be obtained and can be used as, for example, a band elimination filter.

In the dielectric resonator device according to the tenth aspect,
With each dielectric resonator arranged on the substrate, the rod-shaped coupling body is inserted into the hole of each dielectric resonator. Accordingly, the dielectric resonators are individually arranged on the substrate, and the dielectric resonators are coupled to each other to form one dielectric resonator device on the substrate.

In the dielectric resonator device according to claim 11,
The rod-shaped coupling body is inserted into the hole of each dielectric resonator in a state where the dielectric resonators are joined and integrated. As a result, a dielectric resonator device in which a plurality of dielectric resonators are joined and integrated in a state before being mounted on a circuit board or the like is obtained.

In the dielectric resonator device according to claim 12,
A signal input / output conductor is formed near the opening of the hole provided in the dielectric resonator, and the auxiliary conductor of the rod-shaped coupling body is connected to or close to the signal input / output conductor. With this configuration, it is possible to obtain the dielectric resonator device including the signal input / output conductor that is directly connected to the auxiliary conductor or is connected to the auxiliary conductor via the capacitance.

[0030]

1 to 10 show the structure of a dielectric resonator device according to a first embodiment of the present invention.

FIG. 1 is a perspective view of the appearance of the entire dielectric resonator device. FIG. 1A is a perspective view seen from diagonally above in a state of being mounted on a circuit board or the like, and FIG. Shows the state. In FIG. 1, Ra, Rb, Rc
Is a dielectric resonator formed by forming various conductors on a prismatic dielectric block having through holes 2a, 2b, 2c therein. Holes are formed on the side surfaces of the three dielectric resonators so as to penetrate in the direction intersecting the through holes 2a, 2b, 2c, and one cylindrical rod-shaped coupling body 30 is formed in these hole portions. Inserting. Adjacent dielectric resonators of these three dielectric resonators are coupled to each other to form a dielectric resonator device that can be used as a bandpass filter or the like. As shown in FIG. 3B, the dielectric resonators Ra and Rc have signal input / output conductors 7a and 7c, respectively.
forming c.

FIG. 2 is a perspective view showing a state before the rod-shaped combined body 30 is inserted in the state shown in FIG. 1 (A). The rod-shaped combined body 30 is formed by forming three auxiliary conductors 32, 33, and 34 on the side surface of a cylindrical dielectric rod 31.

FIG. 3 is an exploded perspective view of the dielectric resonator device before the rod-shaped coupling body 30 shown in FIG. 2 is inserted. The dielectric resonators Ra, Rb, Rc are provided with through holes 2a, 2 between the first surface S1 and the second surface S2, which face each other.
Each of the through holes 2 is provided with a dielectric block in which b and 2c extend.
Inner conductors are formed on the inner peripheral surfaces of a, 2b, and 2c, and the hole portions 8a, 8b, and
8c is formed. In addition, the outer conductors 6a, 6b, 6 are provided on the other five surfaces of the dielectric block except the first surface S1.
forming c. In this way, each dielectric resonator is formed individually, but since the structure of each dielectric block is basically the same, a dedicated mold is not required for the resonators of each number of stages, and a common mold is used. Can be easily manufactured.

FIG. 4 is a sectional view of a portion XX in FIG. As described above, the inner conductors 3a, 3 are provided on the inner surfaces of the holes 8a, 8b, 8c provided in the dielectric resonators Ra, Rb, Rc.
Part of b and 3c is exposed.

FIG. 5 shows Y of the dielectric resonator device shown in FIG.
It is a sectional view of a 2-Y2 portion. Further, FIG. 6 is a sectional view of a portion Y1-Y1 in FIG. As shown in both figures, the holes provided in each dielectric resonator are formed in a direction orthogonal to each axis of the through holes 2a, 2b, 2c.

FIG. 7 is a sectional view of the XX portion in FIG. 1A, and FIG. 8 is a sectional view of the Y2-Y2 portion in FIG. 1A with the dielectric resonator device mounted on the circuit board. It is a figure. However, the rod-shaped combined body 30 is not cut. Further, FIG. 9 is a sectional view of a portion Y1-Y1 in FIG. 1A in a state where the dielectric resonator device is mounted on the circuit board. The auxiliary conductor 3 provided on the rod-shaped coupling body 30 with the rod-shaped coupling body 30 inserted in the dielectric resonator device as described above.
2, 33, 34 are the inner conductors 3a, 3b of the dielectric resonator,
Connect near the open end of 3c. As described above, in order to mount the rod-shaped coupling member in the dielectric resonator device,
Solder paste (cream solder) on either or both of the surface of each auxiliary conductor of the rod-shaped combination or near the hole of the inner conductor
Is applied, and the auxiliary conductor and the inner conductor are soldered by the reflow soldering method with the rod-shaped combined body inserted. As another method, with the rod-shaped coupling body 30 inserted in the dielectric resonator, solder paste is applied from one opening of each of the through holes 2a, 2b, 2c and soldered by the reflow soldering method.

As shown in FIG. 8, the capacitance Ca is provided between the auxiliary conductors 32-33 through the dielectric 31 portion of the rod-shaped coupling body.
b is formed, and similarly, a capacitance Cbc is formed between the auxiliary conductors 33 and 34. Further, an electrostatic capacitance Ce as an external coupling capacitance is formed between the auxiliary conductor 32 and the signal input / output conductor 7a provided in the dielectric resonator, and similarly, an electrostatic capacitance Ce is provided between the auxiliary conductor 34 and the signal input / output conductor 7c. Composed. These signal input / output conductors 7a and 7c are the transmission lines 2 on the circuit board.
2, 23, and the outer conductor of the dielectric resonator is connected to the ground conductor 21 on the circuit board by reflow soldering or the like to surface-mount the dielectric resonator device on the circuit board 20. In this way, since the coupling capacitance between the resonators is determined by the auxiliary conductor provided in the rod-shaped coupling body, the degree of coupling between the resonators can be easily set independently of other characteristic elements such as the resonance frequency of the resonator. Can be set and adjusted.

FIG. 10 is an equivalent circuit diagram of the dielectric resonator device shown in FIGS. In FIG. 10, Ra, Rb,
Rc is a dielectric resonator having an inner conductor whose resonance length is ¼ wavelength at the resonance frequency, and each capacitor is shown in FIG.
It is the capacitance configured in each part shown in. In this way, it can be used as a bandpass filter, etc.
A dielectric resonator device in which a plurality of stages of dielectric resonators are coupled is obtained.

FIG. 11 is a perspective view showing the structure of the dielectric resonator device of the second embodiment. In this example, 3
With one dielectric resonator Ra, Rb, Rc being surface-mounted on the circuit board 20, the rod-shaped coupling body 30 is inserted through the hole of each dielectric resonator. Unlike the dielectric resonator device shown as the first embodiment, the respective dielectric resonators are not directly bonded and integrated, but the mutual positional relationship is relatively fixed via the circuit board. Even in such a case, adjacent dielectric resonators can be coupled by the action of the auxiliary conductor provided in the rod-shaped coupling body.

Next, the structure of the dielectric resonator device of the third embodiment is shown in FIGS.

FIG. 12 is a perspective view of the appearance of the entire dielectric resonator device. FIG. 12A is a perspective view seen from diagonally above in a state of being mounted on a circuit board or the like, and FIG. Shows the state. In FIG. 12, Ra, Rb, R
Reference numeral c is a dielectric resonator formed by forming various conductors on a prismatic dielectric block having through holes 2a, 2b and 2c therein. Holes are formed on the side surfaces of the three dielectric resonators so as to penetrate in the direction intersecting the through holes 2a, 2b, 2c, and one cylindrical rod-shaped coupling body 30 is formed in these hole portions. Inserting. Adjacent dielectric resonators of these three dielectric resonators are coupled to each other to form a dielectric resonator device that can be used as a bandpass filter or the like. As shown in FIG. 7B, the dielectric resonators Ra and Rc have signal input / output conductors 7a and 7a, respectively.
7c is formed.

FIG. 13 is a perspective view showing the state before the insertion of the rod-shaped combined body 30 in the state shown in FIG. The rod-shaped combined body 30 is formed by forming three auxiliary conductors 32, 33, and 34 on the side surface of a cylindrical dielectric rod 31.

FIG. 14 is an exploded perspective view of the dielectric resonator device before the rod-shaped coupling body 30 shown in FIG. 13 is inserted. The dielectric resonators Ra, Rb and Rc are respectively
Between the first surface S1 and the second surface S2 facing each other, the through hole 2a,
Each through hole 2 is provided with a dielectric block in which 2b and 2c extend.
Inner conductors are formed on the inner peripheral surfaces of a, 2b, and 2c, and the hole portions 8a, 8b, and
8c is formed. Further, outer conductors 6a, 6b, 6c are formed on the outer surface (six surfaces) of each dielectric block.

FIG. 15 is a sectional view of a portion XX in FIG. In FIG. 15, 5a, 5b, and 5c are gaps in which no inner conductor is formed. One end of one inner conductor 3a, 3b, 3c separated by these gaps is continuous from the outer conductor of the first surface S1 of the dielectric block, and the other end of the inner conductor 4a, 4b, 4c is a dielectric body. It is continuous from the outer conductor of the second surface S2 of the block. One inner conductor 3a, 3b, 3c acts as a resonance conductor, and a stray capacitance is generated between the open end formed in the gap 5a, 5b, 5c and the other inner conductor 4a, 4b, 4c. As shown in the figure, each dielectric resonator Ra, Rb, Rc
The holes 8a, 8b, 8c provided in the inner conductors 3a, 8b, 8c are located near the open ends of the inner conductors 3a, 3b, 3c acting as resonance conductors, and the inner conductors 3a, 3b are formed on the inner surfaces of these holes 8a, 8b, 8c.
Part of b and 3c is exposed.

FIG. 16 is a sectional view of the Y2-Y2 portion of the dielectric resonator device shown in FIG. In addition, FIG.
6 is a cross-sectional view of a Y1-Y1 portion in FIG. As shown in both figures, the holes provided in each dielectric resonator are the through holes 2a, 2
It is formed in a direction orthogonal to each axis of b and 2c.

FIG. 18 is a sectional view of the XX portion in FIG. 12A, and FIG. 19 is a sectional view of the Y2-Y2 portion in FIG. 12A with the dielectric resonator device mounted on the circuit board. It is a figure. However, the rod-shaped combined body 30 is not cut. Further, FIG. 20 is a cross-sectional view of a portion Y1-Y1 in FIG. 12A in a state where the dielectric resonator device is mounted on the circuit board. With the rod-shaped coupler 30 inserted in the dielectric resonator device as described above, the auxiliary conductors 32, 33, and 34 provided in the rod-shaped coupler 30 are connected to the inner conductors 3 of the dielectric resonator.
Connections are made near the open ends of a, 3b, and 3c. In this way, the rod-shaped coupling body is mounted in the dielectric resonator device by applying solder paste (cream solder) and soldering by the reflow soldering method as in the case of the first embodiment.

As shown in FIG. 19, auxiliary conductors 32-33
A capacitance C is provided between the dielectric 31 portions of the rod-shaped coupling body.
ab, and similarly, a capacitance Cbc is formed between the auxiliary conductors 33 and 34. Further, as shown in FIG. 20, a capacitance Ce is formed between the open end of the inner conductor 3a and the signal input / output conductor 7a. A capacitance Ce is similarly formed between the open end of the inner conductor 3c and the signal input / output conductor 7c.

FIG. 21 is an equivalent circuit diagram of the dielectric resonator device shown in FIGS. In FIG. 21, Ra, R
b and Rc are dielectric resonators whose inner conductor has an axial length of ¼ wavelength at the resonance frequency, and Cs is a stray capacitance formed in the gaps 5a, 5b and 5c shown in FIG. The capacitor is a capacitance formed in each part shown in FIGS. 19 and 20. In this way, a dielectric resonator device in which three stages of dielectric resonators, which can be used as a bandpass filter or the like, are coupled is obtained.

Next, the construction of the dielectric resonator device of the fourth embodiment is shown in FIGS.

22A and 22B are perspective views showing the appearance of the entire dielectric resonator device. FIG. 22A is a perspective view seen from diagonally above in a state of being mounted on a circuit board or the like, and FIG. Shows the state. In FIG. 22, Ra, Rb, R
Reference numeral c is a dielectric resonator formed by forming various conductors on a prismatic dielectric block having through holes 2a, 2b and 2c therein. Holes are formed on the side surfaces of the three dielectric resonators so as to penetrate in the direction intersecting with the through holes 2a, 2b and 2c, and one cylindrical rod-shaped coupling body 30 is formed in these hole portions. Inserting. Adjacent dielectric resonators of these three dielectric resonators are coupled to each other to form a dielectric resonator device that can be used as a bandpass filter or the like. As shown in FIG. 7B, the dielectric resonators Ra and Rc have signal input / output conductors 7a and 7a, respectively.
7c is formed.

FIG. 23 is a perspective view showing the state before the insertion of the rod-shaped combined body 30 in the state shown in FIG. The rod-shaped combined body 30 is formed by forming five auxiliary conductors 32, 33, 34, 35 and 36 on the side surface of a cylindrical dielectric rod 31.

FIG. 24 is a sectional view of the YY portion in FIG. 23, and FIG. 25 is a sectional view of the YY portion in FIG. 23 in a state where the dielectric resonator device is mounted on the circuit board. In FIG. 25, a capacitance Cab is formed between the auxiliary conductors 32-33 via the dielectric portion of the rod-shaped coupling body, and a capacitance Cbc is similarly formed between the auxiliary conductors 33-34.
A capacitance Ce is formed between the auxiliary conductors 35-32 via the dielectric portion of the rod-shaped combination body, and similarly, the auxiliary conductor 34 is formed.
A capacitance Ce is formed between −36. The two auxiliary conductors 35 and 36 are directly connected to the signal input / output conductors 7a and 7b, and the two electrostatic capacitances Ce act as external coupling capacitances. As a result, a dielectric resonator device that can be expressed by an equivalent circuit similar to that shown in FIG. 21 is obtained.

Next, the construction of the dielectric resonator device of the fifth embodiment is shown in FIGS. FIG. 26 is an external perspective view of the entire dielectric resonator device. FIG. 26A is a perspective view seen from diagonally above in a state of being mounted on a circuit board or the like.
(B) shows a state in which the upper and lower surfaces are inverted in that state. Figure 2
In FIG. 6, Ra, Rb, and Rc are dielectric resonators formed by forming various conductors in a prismatic dielectric block having through holes 2a, 2b, and 2c therein. Through holes 2a, 2b, 2c are formed on the side surfaces of the three dielectric resonators.
Holes penetrating in the direction intersecting with are formed, and a single rod-shaped coupling body 40 having a prismatic shape is inserted into these holes. As shown in FIG. 3B, the dielectric resonators Ra and R
Signal input / output conductors 7a and 7c are formed on c, respectively.

FIG. 27 is a perspective view showing a state before the insertion of the rod-shaped combined body 40 in the state shown in FIG. The rod-shaped combined body 40 is formed by forming five auxiliary conductors 42, 43, 44, 52 and 53 on the side surface of a prismatic dielectric rod 41.

FIG. 28 is an exploded perspective view showing the structure of the rod-shaped combined body. This rod-shaped combined body is composed of a joined body of prismatic dielectric rods 41a and 41b having various conductor patterns formed on their respective surfaces. Auxiliary conductors 45a, 46a, 47a that form a capacitance with the auxiliary conductors 42a, 43a, 44a are formed on the surface of the dielectric rod 41a facing 41b. Auxiliary conductors 48a and 49a acting as inductors are formed between the auxiliary conductors 45a-46a and between the auxiliary conductors 46a-47a, respectively. Further, between the auxiliary conductors 45a and 47a and the auxiliary conductors 52a and 53a provided on the end surfaces of the dielectric rods, auxiliary conductors 50a and
51a are formed respectively. 41 of the dielectric rod 41b
On the surface facing a, an auxiliary conductor having a pattern symmetrical to the various auxiliary conductors provided on the dielectric rod 41a is formed. By joining and integrating these two dielectric rods 41a and 41b, one rod-shaped combined body 40 shown in FIG.
Are configured.

FIG. 29 is a cross-sectional view of the portion YY in FIG. 26A when it is mounted on the circuit board. In this way, the auxiliary conductors 42, 43, 44 provided in the rod-shaped coupling body are respectively connected to the inner conductors 3a, 3b, 3c of the dielectric resonator, and the auxiliary conductors 52, 53 are the signal input / output conductors 7a, 7c.
connected to c respectively.

FIG. 30 is an equivalent circuit diagram of the dielectric resonator device shown in FIGS. In FIG. 30, capacitors Ca, Cb, and Cc are auxiliary conductors 45a shown in FIG.
46a, 47a (and mirror-symmetrical relationship with them,
Auxiliary conductor formed on the dielectric rod 41b) and auxiliary conductor 42a,
It is the electrostatic capacitance formed between b, 43a, b, 44a, b. Further, Lab and Lbc in FIG. 30 are inductances due to the auxiliary conductors 48a and 49a shown in FIG. 28 (and auxiliary conductors formed on the dielectric rod 41b, which are in mirror symmetry with the auxiliary conductors). These capacitance and inductor form a π-type phase inversion circuit. This makes 3
(EN) A dielectric resonator device which can be used as a band elimination filter including a stepped dielectric resonator.

Next, the construction of the dielectric resonator device of the sixth embodiment is shown in FIGS.

FIG. 31 is an external perspective view of the entire dielectric resonator device. FIG. 31A is a perspective view seen from diagonally above in a state of being mounted on a circuit board or the like, and FIG. Shows the state. 32 is a perspective view showing a state before insertion of the rod-shaped combined body 30 in the state shown in FIG.
FIG. 33 is an exploded perspective view of the dielectric resonator device before the rod-shaped coupling body 30 shown in FIG. 32 is inserted. Further, FIG. 34 is a cross-sectional view of the Y2-Y2 portion in FIG. 31A in the state where the dielectric resonator device is mounted on the circuit board. The difference from the first embodiment is that an outer conductor non-formation portion is provided around the opening of the hole of each dielectric resonator into which the rod-shaped coupling body 30 is inserted. The other structure is similar to that of the first embodiment. In this embodiment, as shown in FIG. 34, since there is no outer conductor in the vicinity of the auxiliary conductors 32, 32, 33, the stray capacitance between the auxiliary conductors 32, 33, 34 and the outer conductors can be kept small.

In the illustrated embodiment described above, a part of the auxiliary conductor formed in the rod-shaped coupling body is directly connected to the inner conductor of the dielectric resonator so that the capacitance between the auxiliary conductors formed in the rod-shaped coupling body is increased. An example was shown in which the dielectric resonators were coupled by using the above.When the rod-shaped coupling body was inserted into the hole of the dielectric resonator, the auxiliary conductor of the rod-shaped coupling body became the inner conductor of the dielectric resonator. Even if the positional relationship is such that the dielectric conductors are not in direct contact with each other, the dielectric resonators can be coupled to each other by utilizing the electrostatic capacitance generated between the auxiliary conductor and the inner conductor.

In each of the above-described illustrated embodiments, one end of the inner conductor of each dielectric resonator is a short-circuited end and the other is an open end, and the inner conductor has an axial length of ¼ wavelength at the resonance frequency. Is shown as a resonance conductor, but the same applies to a dielectric resonator in which both ends of the inner conductor are open ends and an inner conductor having an axial length of ½ wavelength is made to act as a resonance conductor. be able to. Further, the same can be applied to a dielectric resonator in which both ends of the inner conductor are short-circuited ends and an inner conductor having an axial length of ½ wavelength acts as a resonance conductor. In the latter case, in order to couple the adjacent dielectric resonators, a hole is provided near the center of the inner conductor where the electric field energy component is dominant,
It suffices to insert the rod-shaped combined body shown in the above-mentioned embodiment.

In each of the embodiments, a through hole extending between the first surface and the second surface is provided in the dielectric block, and the inner conductor is formed on the inner surface of the through hole. The portion does not necessarily have to penetrate, and the point is that the inner conductor may be provided in the void provided in the dielectric block. Further, in the third and fourth embodiments, the example in which the open end portion of the inner conductor is formed by providing the gap portion in the through hole in which the inner conductor is formed, the gap portion is deep in the through hole. It may be provided at the opening instead of at the location. This facilitates formation of the gap.

[0063]

According to the present invention, the conventional shield case and mounting bracket are not required, the manufacturing cost is low, the dielectric resonator device is small in size and has a plurality of stages of resonators. A dielectric resonator device that can be easily manufactured without requiring a dedicated mold for the resonator, and that the resonance frequency of each resonator and the coupling degree between the resonators are set or adjusted independently of each other. can get. In particular, since the rod-shaped coupling body for coupling between the dielectric resonators is inserted into the hole provided in the dielectric resonator, there is no need to provide a conventional coupling substrate outside the dielectric resonator, The overall size is reduced, and the mounting space for the circuit board is also reduced.

In the dielectric resonator device according to the second aspect, since the auxiliary conductor is connected to the inner conductor in the state where the rod-shaped coupling body is inserted, it is not necessary to insert the coupling terminal from the outside as in the conventional case, and the component The points can also be reduced.

In the dielectric resonator device according to a third aspect of the present invention, since a capacitance is formed between the auxiliary conductor and the inner conductor in a state where the rod-shaped coupling body is inserted in the hole of the dielectric resonator, the conventional structure is obtained. In addition, the capacitance can be formed between a predetermined conductor and the inner conductor without using a resin-insulated coupling terminal (so-called resin pin).

In the dielectric resonator device according to the fourth aspect, since the electrostatic capacitance is formed between the auxiliary conductors provided in the rod-shaped coupling body, this electrostatic capacitance is utilized to cause the adjacent dielectric resonators to move. The inner conductors can be easily coupled.

In the dielectric resonator device according to the fifth aspect, since the capacitance and / or the inductor are formed by the auxiliary conductor of the rod-shaped coupling body, the capacitance and / or the inductor are formed as individual components. It can be incorporated in a dielectric resonator without using it, and a dielectric resonator device that functions as a band elimination filter by configuring, for example, a phase inversion circuit can be easily obtained.

In the dielectric resonator device according to the sixth, seventh, and eighth aspects, the rod-shaped coupling body is inserted in a position where the electric field energy component of the inner conductor of each dielectric resonator is predominant, thereby assisting the rod-shaped coupling body. The electric field coupling can be easily performed between the dielectric resonators via the conductor.

In the dielectric resonator device according to the tenth aspect,
Even if a plurality of dielectric resonators are not joined and integrated, they can be coupled in a state of being arranged on the substrate, so that the degree of freedom in design by combining a plurality of dielectric resonators is increased.

In the dielectric resonator device according to claim 11,
Since a plurality of dielectric resonators are joined and integrated, the handling as a single dielectric resonator device is easy when mounting on a circuit board.

In the dielectric resonator device according to claim 12,
Since the auxiliary conductor provided in the rod-shaped coupling body is connected to or close to the signal input / output conductor, the value of the external coupling capacitance can be easily increased.

[Brief description of drawings]

FIG. 1 is an external perspective view of a dielectric resonator device according to a first embodiment, where (A) is a perspective view of a state where the dielectric resonator device is mounted on a circuit board or the like, and (B) is a state shown in (A). FIG. 3 is an external perspective view of the state in which the upper and lower surfaces of the dielectric resonator device are inverted.

FIG. 2 is a perspective view of the dielectric resonator device according to the first embodiment in a state in which a rod-shaped coupling body and the dielectric resonator device are separated from each other.

3 is an exploded perspective view of the dielectric resonator device shown in FIG.

4 is a cross-sectional view taken along line XX in FIG.

5 is a sectional view of a Y2-Y2 portion in FIG.

FIG. 6 is a cross-sectional view taken along the line Y1-Y1 in FIG.

FIG. 7 is a cross-sectional view taken along line XX in FIG.

FIG. 8 is a cross-sectional view of a Y2-Y2 portion in FIG. 1A in a mounted state on a circuit board.

FIG. 9 is a cross-sectional view of a portion Y1-Y1 in FIG. 1A in a mounted state on a circuit board.

FIG. 10 is an equivalent circuit diagram of the dielectric resonator device according to the first embodiment.

FIG. 11 is an external perspective view of a dielectric resonator device according to a second embodiment.

12A and 12B are external perspective views of the dielectric resonator device according to the third embodiment, where FIG. 12A is a perspective view in a state of being mounted on a circuit board or the like, and FIG. 12B is a state shown in FIG. FIG. 3 is an external perspective view of the state in which the upper and lower surfaces of the dielectric resonator device are inverted.

FIG. 13 is a perspective view showing a state in which a rod-shaped coupling body and a dielectric resonator device are separated from each other in the dielectric resonator device of the third embodiment.

14 is an exploded perspective view of the dielectric resonator device shown in FIG.

FIG. 15 is a cross-sectional view taken along the line XX in FIG.

16 is a cross-sectional view taken along the line Y2-Y2 in FIG.

17 is a cross-sectional view taken along the line Y1-Y1 in FIG.

FIG. 18 is a cross-sectional view taken along line XX in FIG.

FIG. 19 is a cross-sectional view of a Y2-Y2 portion in FIG. 12A in a mounted state on a circuit board.

FIG. 20 is a cross-sectional view of a portion Y1-Y1 in FIG. 12A in a mounted state on a circuit board.

FIG. 21 is an equivalent circuit diagram of the dielectric resonator device according to the first embodiment.

22A and 22B are perspective views showing the appearance of a dielectric resonator device according to a fourth embodiment, wherein FIG. 22A is a perspective view in a state of being mounted on a circuit board or the like, and FIG. FIG. 3 is an external perspective view of the state in which the upper and lower surfaces of the dielectric resonator device are inverted.

FIG. 23 is a perspective view showing a state in which a rod-shaped coupling body and a dielectric resonator device are separated from each other in the dielectric resonator device of the fourth embodiment.

FIG. 24 is a cross-sectional view taken along the line YY in FIG.

FIG. 25 is a cross-sectional view taken along the line YY in FIG. 22A in a mounted state on a circuit board.

FIG. 26 is an external perspective view of a dielectric resonator device of a fifth embodiment, (A) is a perspective view in a state of being mounted on a circuit board or the like, and (B) is a state shown in (A). FIG. 3 is an external perspective view of the state in which the upper and lower surfaces of the dielectric resonator device are inverted.

FIG. 27 is a perspective view showing a state in which a rod-shaped coupling body and a dielectric resonator device in the dielectric resonator device of the fifth embodiment are separated.

28 is an exploded perspective view showing the configuration of the rod-shaped combined body 40 shown in FIG. 27. FIG.

FIG. 29 is a cross-sectional view taken along the line YY in FIG. 26A in a mounted state on a circuit board.

FIG. 30 is an equivalent circuit diagram of the dielectric resonator device of the fifth embodiment.

31A and 31B are external perspective views of the dielectric resonator device according to the sixth embodiment, where FIG. 31A is a perspective view in a state of being mounted on a circuit board or the like, and FIG. 31B is a state shown in FIG. FIG. 3 is an external perspective view of the state in which the upper and lower surfaces of the dielectric resonator device are inverted.

FIG. 32 is a perspective view showing a state in which a rod-shaped coupling body and a dielectric resonator device in the dielectric resonator device of the sixth embodiment are separated.

FIG. 33 is an exploded perspective view of the dielectric resonator device shown in FIG. 32.

FIG. 34 is a cross-sectional view of the Y2-Y2 portion in FIG. 31 (A) in a mounted state on a circuit board.

[Explanation of symbols]

 Ra, Rb, Rc-Dielectric resonator 1a, 1b, 1c-Dielectric block 2a, 2b, 2c-Through hole (gap) 3a, 3b, 3c-Inner conductor (resonant conductor) 4a, 4b, 4c-Inner conductor 5a, 5b, 5c-Gap 6a, 6b, 6c-Outer conductor 7a, 7c-Signal input / output conductor 8a, 8b, 8c-Hole 20-Circuit board 21-Ground conductor 22,23-Transmission line 30-Rod-shaped coupling body 31-Dielectric rod 32, 33, 34, 35, 36-Auxiliary conductor 40- Rod-shaped coupling body 41, 41a, 41b-Dielectric rod 42, 43, 44, 52, 53- Auxiliary conductor 42a, 43a, 44a, 52a , 53a-auxiliary conductor

Claims (12)

[Claims] 1. A dielectric resonator device comprising a plurality of dielectric resonators each having an inner conductor formed inside a dielectric block and having an outer conductor formed on the outer surface of the dielectric block. Forming a hole in a direction intersecting the axial direction of the inner conductor in the dielectric block, and in the state in which the plurality of dielectric resonators are arranged, a rod-shaped coupling body having an auxiliary conductor is formed in the hole. A dielectric resonator device characterized by being inserted. 2. The dielectric resonator device according to claim 1, wherein the hole is provided at a position in contact with a part of the inner conductor, and the auxiliary conductor is connected to the inner conductor. 3. The dielectric resonator device according to claim 1, wherein the hole portion is provided at a position close to the inner conductor, and a capacitance is formed between the auxiliary conductor and the inner conductor. 4. The dielectric resonator device according to claim 1, wherein a plurality of auxiliary conductors are formed in an array on the rod-shaped coupling body, and an electrostatic capacitance is formed between adjacent auxiliary conductors. 5. The dielectric resonator device according to claim 1, wherein the auxiliary conductor constitutes a capacitance and / or an inductor. 6. The dielectric according to claim 4, wherein the hole is provided at a position where the electric field energy component of the inner conductor is dominant, and the inner conductors of adjacent dielectric resonators are electrically coupled via the auxiliary conductor. Body resonator device. 7. The dielectric resonator device according to claim 6, wherein the inner conductor is provided with an open end, and the hole is provided near the open end. 8. The dielectric resonator device according to claim 6, wherein both ends of the inner conductor are short-circuited ends, and the hole is provided near the center of the inner conductor. 9. The dielectric resonator device according to claim 5, wherein the auxiliary conductor constitutes a phase inversion circuit. 10. The rod-shaped coupling body is inserted into the hole of each dielectric resonator in a state in which the dielectric resonators are arranged on a substrate, 8. The dielectric resonator device according to 8 or 9. 11. The rod-shaped coupling body is inserted into the hole of each dielectric resonator in a state where the dielectric resonators are bonded and integrated with each other. 8. The dielectric resonator device according to 8 or 9. 12. The signal input / output conductor is formed near the opening of the hole, and the auxiliary conductor is connected to or close to the signal input / output conductor. 7,
8. The dielectric resonator device according to 8, 9, 10 or 11.