JP3316554B2 - Dielectric resonator device - Google Patents

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 in which a conductor is provided on the outer surface of a cavity and an internal dielectric is disposed inside the cavity.

[0002]

2. Description of the Related Art Conventionally, for example, a TM mode dielectric resonator employs a structure as shown in FIG. 1 to facilitate arrangement of a conductor serving as a ground conductor and an internal dielectric provided inside. I have. In FIG. 1, reference numeral 1 denotes a cavity having openings 31 and 32, and a conductor 2 is provided on its outer surface (upper and lower surfaces and left and right side surfaces in the figure) and two dielectric columns 4x are provided.
And an inner dielectric 4 having a shape crossing 4y
It is arranged inside.

[0003] When a dielectric resonator device that functions as a filter or the like is constructed using such a dielectric resonator, as disclosed in Japanese Utility Model Laid-Open Publication No. 1-172702, a conventional dielectric resonator device is used. The dielectric resonator device is formed by arranging the opening surfaces so as to face each other and soldering a conductor provided on the outer surface of an adjacent dielectric resonator via a ground plate.

[0004]

However, when a conductor provided on the outer surface of the dielectric resonator is connected to another conductor, a structure in which the two are soldered via a conductive plate is used. If a metal panel is provided on the opening surface of the dielectric resonator, a structure as shown in FIG. 7 is adopted, for example. FIG. 7 is a cross-sectional view of the dielectric resonator device. In the figure, reference numerals 8 and 9 denote metal panels covering the two opening surfaces 31 and 32 of the dielectric resonator shown in FIG. The conductive plate 6 is soldered to the conductor 2 and the metal panels 8 and 9 provided in the above. In the example shown in FIG. 7, the input / output connector 10 and the coupling loop 11 are attached to the metal panel 8, and the whole is accommodated in the case 12.

However, as shown in FIG. 7, when the metal panel 8 is used as a part of the case, a thickness for maintaining a predetermined strength is required. Especially I / O connector 1
In the case where the input / output connector 10 is attached, the metal panel 8 needs to have enough strength so that the metal panel 8 is not deformed even if the input / output connector 10 is twisted and the electrical characteristics do not fluctuate. Must be bigger. However, when the thickness of the metal panel is increased, the heat diffusion from the vicinity of the soldering of the conductive plate 6 to the metal panel becomes severe. In particular, when a plurality of dielectric resonators are arranged and a large metal panel spanning them is used, the entire metal panel together with the plurality of dielectric resonators must be preheated in an oven or the like and then soldered. In addition, since the operation was performed under high heat, the workability was extremely poor, and was also dangerous for workers.

An object of the present invention is to provide a dielectric resonator device that facilitates connection of a conductive plate to a metal panel that covers an opening surface of a dielectric resonator.

Another object of the present invention is to provide a dielectric resonator device which uses a metal panel having a large thickness to improve stability against impact and external force.

[0008]

According to a first aspect of the present invention, there is provided a dielectric resonator device comprising: a conductive member provided on an outer surface of a cavity having an opening; and an internal dielectric member disposed inside the cavity. In a dielectric resonator device using a dielectric resonator, one end of a flexible conductive plate is joined to the conductor provided near the periphery of the opening surface, and the opening surface is covered with a metal panel. Then, the metal panel and the dielectric resonator are housed in a case, and the other end of the conductive plate is sandwiched between the case and the metal panel to electrically connect the conductive plate to the metal panel. Characterized in that it is connected to The “conductive plate” according to the present invention is a plate having flexibility and conductivity, and is a concept including, for example, a metal mesh.

A dielectric resonator device according to a second aspect of the present invention is the dielectric resonator device according to the first aspect, wherein an elastic body is interposed between the case and the conductive plate, and a screw is formed between the metal panel and the case. It is characterized by being stopped and fixed.

According to a third aspect of the present invention, there is provided a dielectric resonator device according to the first or second aspect, wherein an elastic body is provided in a space between the dielectric resonator and an inner surface of the case.
The dielectric resonator is elastically held in the case.

According to a fourth aspect of the present invention, there is provided a dielectric resonator device according to the first, second or third aspect, wherein the dielectric resonators are formed such that the opening surfaces of the respective cavities are substantially flush with each other. A plurality of dielectric resonators are arranged, and the metal panels are arranged on the opening surfaces of the dielectric resonators so as to straddle the plurality of dielectric resonators.

[0012]

In the dielectric resonator device according to the first aspect, one end of a flexible conductive plate is joined to the conductor at the periphery of the opening surface of the dielectric resonator by soldering or the like. A metal panel and a dielectric resonator covering an opening surface of the conductive plate are housed in a case, and the other end of the conductive plate is sandwiched between the metal plate and the case. According to this structure, the work of soldering the conductive plate to the metal panel becomes unnecessary, the work of preheating the entire metal panel and the dielectric resonator described above becomes unnecessary, and the connection of the conductive plate to the metal panel becomes easy.

In the dielectric resonator device according to a second aspect, the metal panel and the case are fixed by screws between the case and the conductive plate via an elastic body. According to this structure, the conductive plate can be sandwiched between the metal panel and the case when the metal panel is mounted on the case, and the fixing between the case and the metal panel and the connection of the conductive plate to the metal panel are facilitated. Further, since the metal panel is attached to the case side, the external force applied to the metal panel is not directly applied to the dielectric resonator, and the characteristics of the dielectric resonator device do not change due to the external force applied to the metal panel.

According to a third aspect of the present invention, an elastic body is provided in a space between the dielectric resonator and the inner surface of the case, and the dielectric resonator is elastically held in the case. With this structure, the impact on the dielectric resonator from outside the device or from the case is reduced, and thus the dielectric resonator can be prevented from being broken or broken due to the impact.

In the dielectric resonator device according to a fourth aspect, a plurality of dielectric resonators are arranged so that the opening surfaces of the dielectric resonators are substantially flush with each other. The metal panel is disposed straddling. With this structure, when forming a dielectric resonator device in which a plurality of dielectric resonators are arranged, connection (ground connection) between conductors provided on the outer surface of the dielectric resonator is reliably performed. The number of parts is reduced, the mechanical strength is improved, and assembly is facilitated.

[0016]

1 to 6 show the structure of a dielectric resonator device according to an embodiment of the present invention.

The structure of the dielectric resonator is as shown in FIG. As described above, in FIG. 1, reference numeral 1 denotes a cavity having openings 31 and 32, and a conductor 2 is provided on its outer surface (upper and lower surfaces and left and right side surfaces in the figure), and two dielectric columns 4x and 4y are formed. The crossed internal dielectrics 4 are arranged inside the cavity 1. In this embodiment, the internal dielectric 4 and the cavity 1 are formed by integral molding. At the intersection of the two dielectric columns 4x, 4y, a groove g,
g, a difference is generated between the resonance frequencies of the odd mode and the even mode generated by the two dielectric columns 4x and 4y,
The two resonators formed by the dielectric columns 4x and 4y are coupled. Thus, the dielectric resonator 5 acting as a two-stage resonator is configured. As described later, three such dielectric resonators are arranged to constitute a dielectric resonator device that functions as a band-pass filter including six-stage resonators. At that time, in order to couple a predetermined resonator between adjacent dielectric resonators, a part of the conductor 2 is removed to form a window for magnetic field coupling. In FIG. 1, the configuration for adjusting the resonance frequency and the configuration for adjusting the coupling coefficient between the two resonators are omitted.

FIG. 2 shows a state in which a conductive plate is joined to the dielectric resonator shown in FIG. Thus, the dielectric resonator 5-2
61 to the conductor 2 near the periphery of the two opening surfaces 31 and 32
One end of each of eight conductive plates 64, 71 to 74 (shown hidden behind in FIG. 2, but another conductive plate exists at a position facing the conductive plate 74) is denoted by S. Soldered. At the time of this soldering, if the heat capacity of the cavity is large, it is necessary to preheat the cavity. Even in this case, only the single dielectric resonator is preheated. The operation is easier than heating the entire metal panel. As these conductive plates, a metal foil that can be soldered such as a copper foil can be used, and a plating film for corrosion prevention such as a silver plating film may be formed on the surface as needed. In addition, a mesh-shaped conductive plate can be used instead of the metal foil, and a plurality of slit holes are formed in a portion of the dielectric resonator to be soldered to the conductor to facilitate solderability. May be. The two holes provided at the other end of each conductive plate are used to penetrate a screw when making contact with the metal panel, as described later.

FIG. 3 is a perspective view showing the structure of the metal panel. As shown in FIG. 3, the metal panel 8 is formed by forming a plurality of holes in a metal plate. As shown later, this metal panel 8 is a metal panel on the input / output connector mounting side used when three dielectric resonators shown in FIG. 2 are arranged to form one dielectric resonator device. ha1, ha2, ha3, h
a4, hb1, hb2, hb3, hb4, hc1, hc
2, hc3, hc4 are screw holes for screwing a case, which will be described later, to the metal panel 8. ha
5, ha6, ha7, ha8, hb5, hb6, hb
Reference numerals 7, hb8, hc5, hc6, hc7, hc8 are screw holes for screwing a holding plate described later to the metal panel 8. Ha and Hc are holes for attaching an input / output connector. SLab and SLbc are slit holes for bending the metal panel 8 through the conductive plates 63 and 64 shown in FIG.

The other metal panel facing the metal panel 8 is provided with holes Ha and Hc for mounting input / output connectors.
It is the same as the metal panel 8 except that no metal panel is provided.

FIG. 4 shows an arrangement in which three dielectric resonators shown in FIG. 2 are arranged so that their respective opening surfaces are on the same plane, and two metal panels covering the respective opening surfaces are provided with three dielectric resonators. And a state where the conductive plate is bent. In FIG. 4, reference numerals 5a, 5b, and 5c denote dielectric resonators each having the structure shown in FIG. Dielectric resonator 5
a conductive plates 61a, 61 each having one end soldered to
2a, 63a, 64a, conductive plates 61a, 62a,
63a is the metal panel 8 from the outside of the metal panel 8 respectively.
The conductive plate 64a is bent to the front side of the metal panel 8 through the slit hole SLab of the metal panel 8. Among the conductive plates 61b, 62b, 63b, and 64b each having one end soldered to the dielectric resonator 5b, the conductive plates 61b and 62b are bent from the outside of the metal panel 8 to the surface side of the metal panel 8, respectively. ,
64b is a slit hole SLab, SLbc of the metal panel 8.
And is bent toward the front side of the metal panel 8. Of the conductive plates 61c, 62c, 63c, 64c each having one end soldered to the dielectric resonator 5c, the conductive plate 61
c, 62c, and 64c are bent from the outside of the metal panel 8 to the surface of the metal panel 8, respectively, and the conductive plate 63c is bent to the surface of the metal panel 8 through the slit holes SLbc of the metal panel 8. The input / output connectors 10a and 10c are already attached to the metal panel 8, and a coupling loop is attached to the inner surface side of the metal panel 8. Similarly, the conductive plates 71a, 71b, 71c, 74c and the like are bent for the other metal panel 9 facing the metal panel 8. As described later, the opening surfaces of the dielectric resonators 5a, 5b, 5c and the metal panels 8, 9
An elastic body such as silicone rubber is interposed between them.

FIG. 5 is a perspective view showing the entire structure of the dielectric resonator device in which the device shown in FIG. 4 is housed in a case. 5, reference numeral 13 denotes an upper half of a case that covers the upper part of the apparatus shown in FIG. 4, and reference numeral 14 denotes a lower half of a case that covers the lower part of the apparatus shown in FIG. When covering the upper case half 13 and the lower case half 14 from the state shown in FIG. 4, the metal panels 8, 9 are pressed in a direction in which the distance between the metal panels 8, 9 is reduced, and the metal panels 8, 9 and the dielectric are pressed. Resonators 5a, 5b, 5c
In the state where the above-mentioned elastic body is compressed between the cases 13, 1
Put 4 on. Case upper half 13 and case lower half 14
The upper case half 13 and the lower case half 14 are screwed to the metal panels 8 and 9 in a state in which the metal panels 8 and 9 are put on the upper and lower sides of the apparatus, so that the metal panels 8 and 9 and the cases 13 and 1 are screwed.
Fix 4 spaces. At this time, each screw passes through a hole provided at the end of each conductive plate. Thus, the conductive plates 61a, 61b, 61c shown in FIG.
The conductive plates 71a, 71b, and 71c are sandwiched between the upper case half 13 and the metal plate 9. Similarly, the conductive plates 62a, 62b, and 62c shown in FIG. 4 are sandwiched between the lower case half 14 and the metal plate 8, and the three conductive plates hidden behind in FIG. It is sandwiched between metal plates 9. An elastic body such as silicone rubber is provided on the inner surface of the vertical plane in the figures of the cases 13 and 14, and the plurality of conductive plates are brought into contact with the metal plates 8 and 9 via the elastic body.

In FIG. 5, reference numeral 15a denotes a holding plate made of a metal plate or an insulating plate for holding the folded portion of the conductive plate 63a shown in FIG. 4, and as shown in FIG. The conductive plate 63a is electrically connected to the metal panel 8. Similarly, reference numeral 15c denotes a holding plate for holding the folded portion of the conductive plate 64c shown in FIG. 4, and the holding plate 15c is screwed to the metal panel 8 as shown in FIG. 8 is electrically connected. 15ab is the conductive plate 6 shown in FIG.
5A and 5B are metal pressing plates for holding the folded portions of the conductive plates 64a and 63b. As shown in FIG.
a and 63b are electrically connected to each other via the pressing plate 15ab, and are also electrically connected to the metal panel 8. Similarly, 15bc is the conductive plate 6 shown in FIG.
4b and 63c are metal pressing plates for pressing the folded portions of the conductive plates 64b and 63c.
b and 63c are electrically connected to each other via the holding plate 15bc, and are also electrically connected to the metal panel 8.

FIG. 6 is a sectional view taken along the line YY in FIG. As shown in FIG. 6, an elastic body 17 such as silicone rubber is interposed between one opening surface of the dielectric resonator 5a and the metal panel 8, and the other opening surface of the dielectric resonator 5a is Also, an elastic body 18 such as silicone rubber is interposed between them. Elastic bodies 19, 20 are provided between the ends of the conductive plates 61a, 71a and the inner surface of the case upper half 13.
Is interposed. Elastic bodies 21 and 22 are interposed between the ends of the conductive plates 62a and 72a and the inner surface of the lower case half portion 14. In addition, the dielectric resonator 5a and the upper case half 1
Elastic bodies 23 and 24, such as silicone rubber, are provided in the space between 3 and the inner surface of the lower half 14 of the case, and the dielectric resonator 5a is held through the elastic bodies. The elastic members 23 and 24 may be held between the case upper half portion 13 and the case lower half portion 14 from the state shown in FIG. It may be provided by applying silicone rubber and then attaching the case, or by filling from the gap after attaching the case.

In the dielectric resonator portion shown in FIG. 6, the cavities 1 and 61a, 62a, 7
A resonance space is constituted by conductive plates indicated by 1a, 72a and the like and metal panels 8, 9 covering the opening surface of the cavity 1,
A two-stage resonator is constituted together with the internal dielectric 4a. Also, a coupling loop 11a connected between the center conductor of the input / output connector 10a provided on the metal panel 8 and the metal panel 8.
Is magnetically coupled to a dielectric column of the internal dielectric 4a in a predetermined direction.

Each of the dielectric resonators shown above has 2
Since a predetermined number of resonators are coupled between adjacent dielectric resonators by forming a resonator having a plurality of stages, a dielectric resonator device acting as a band-pass filter including six stages of resonators as a whole is obtained.

[0027]

According to the dielectric resonator device of the first aspect of the present invention, the work of soldering the conductive plate to the metal panel becomes unnecessary, and the work of preheating the entire metal panel and the dielectric resonator becomes unnecessary. Connection of the conductive plate to the metal panel is facilitated.

According to the dielectric resonator device of the second aspect of the present invention, when the metal panel is attached to the case, the conductive plate can be sandwiched between the metal panel and the case, and the metal panel can be attached to the case. Mounting and connection of the conductive plate are facilitated. Further, since the metal panel is attached to the case side, the external force applied to the metal panel is not directly applied to the dielectric resonator, and the characteristics of the dielectric resonator device do not change due to the external force applied to the metal panel.

According to the dielectric resonator device of the third aspect of the present invention, since the impact on the dielectric resonator from outside the device is reduced, damage to the dielectric resonator device due to the impact is reduced. .

According to the dielectric resonator device of the fourth aspect of the present invention, when forming a dielectric resonator device having a plurality of dielectric resonators arranged, the dielectric resonator device is provided on the outer surface of the dielectric resonator. The connection (ground connection) between the conductors is reliably performed, the number of parts is reduced, the mechanical strength is improved, and the assembly is facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of one dielectric resonator.

FIG. 2 is a perspective view showing a state where a conductive plate is soldered to a dielectric resonator.

FIG. 3 is a perspective view illustrating a configuration of a metal panel.

FIG. 4 is a perspective view showing a state in which three dielectric resonators and two metal panels are combined.

FIG. 5 is a perspective view showing the configuration of the entire dielectric resonator device.

FIG. 6 is a sectional view taken along line YY in FIG. 5;

FIG. 7 is a cross-sectional view illustrating a configuration example of a dielectric resonator device based on a conventional technique.

[Explanation of symbols]

 1-cavity 2-conductor (earth conductor) 31,32-opening surface 4-inner dielectric 5-dielectric resonator 61,62,63,64-conductive plate 71,72,74-conductive plate 8,9- Metal panel 10-input / output connector 11-coupling loop 13-upper half of case 14-lower half of case 15-holding plate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-266902 (JP, A) JP-A-3-94808 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01P 1/20-1/219 H01P 7/00-7/10

Claims (4)

(57) [Claims] 1. A dielectric resonator device using a dielectric resonator in which a conductor is provided on an outer surface of a cavity having an opening surface and an internal dielectric is disposed inside the cavity, wherein a peripheral edge of the opening surface is provided. Joining one end of a flexible conductive plate to the conductor provided near the portion, covering the opening surface with a metal panel, and housing the metal panel and the dielectric resonator in a case, A dielectric resonator device characterized in that the other end of the conductive plate is sandwiched between the case and the metal panel, and the conductive plate is electrically connected to the metal panel. 2. The dielectric resonator device according to claim 1, wherein an elastic body is interposed between the case and the conductive plate, and the metal panel and the case are fixed by screws. 3. An elastic body is provided in a space between the dielectric resonator and an inner surface of the case, and the dielectric resonator is elastically held in the case. Dielectric resonator device. 4. A plurality of dielectric resonators are arranged so that the opening surfaces of the cavities form substantially the same plane, and the plurality of dielectric resonators are straddled over the plurality of dielectric resonators. 4. The dielectric resonator device according to claim 1, wherein said metal panel is disposed on an opening surface.