JP2554490Y2 - Dielectric resonator - 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 used for a filter or an oscillator in a microwave band.

[0002]

2. Description of the Related Art An example of a conventional dielectric resonator of this type is shown in FIG. The dielectric resonator includes a TE _01δ mode dielectric resonance element 1. A support 2 is bonded to the dielectric resonance element 1, and the support 2 is bonded to a ceramic plate 3 having a main surface metallized.
On this ceramic plate 3, an opening end is provided with a flange 4a projecting radially outward, and a shield case 4 having a cup shape with a metallized inner surface is covered from the opening side. A ring-shaped spring 5 is externally fitted to the shield case 4 up to its flange portion 4a, one end of a fastener 6 is locked on the spring 5, and the other end of the fastener 6 is attached to a mounting plate 7. It is fixed with screws 8.

[0003] The support 2 and the ceramic plate 3 are adhered by a silver paste, and the support 2 and the dielectric resonator element 1 are adhered by a glass glaze.

[0004]

Incidentally, in the above-mentioned conventional dielectric resonator, the drying time of the silver paste used for bonding the support 2 and the ceramic plate 3 and the support 2 and the dielectric resonator In combination with the time required for welding the glass glaze used for bonding to the substrate 1, a time as long as 10 hours or more is required, and there has been a problem that assembling the dielectric resonator takes time and effort.

In the above-described conventional dielectric resonator, the heat generated in the dielectric resonator element 1 is transmitted from the support 2 supporting the dielectric resonator element 1 on one side thereof to the ceramic plate 3,
The heat is transmitted from the ceramic plate 3 to the shield case 4 and radiated. For this reason, the heat generated in the dielectric resonance element 1 is merely transmitted from one side to the shield case 4 and radiated, so that there is a problem that the heat radiation efficiency is poor.

An object of the present invention is to provide a dielectric resonator which can be assembled in a short time, is easy to assemble, and has a high efficiency of radiating heat generated by the dielectric resonator element.

[0007]

In order to achieve the above object, according to the present invention, a dielectric resonance element having a through hole is supported by a support means inside an intermediate partial shield case having openings at both ends, A dielectric resonator comprising a first partial shield case and a second partial shield case fixed to the intermediate partial shield case so as to cover openings at both ends of the intermediate partial shield case, respectively. A first support plate made of a low dielectric constant material having a hole and having a peripheral portion held between one opening end of the intermediate partial shield case and the first partial shield case; A second support plate having a peripheral portion made of a material having a low dielectric constant and held between the other open end of the intermediate partial shield case and the second partial shield case; Element And inserted through the hole of the first support plate, the through hole of the dielectric resonance element, and the hole of the second support plate to fix the dielectric resonance element between the first support plate and the second support plate. A fixing member made of a material having a low dielectric constant.

[0008]

The dielectric resonance element includes a first support plate and a second support plate in a shield case formed by a first partial shield case, a second partial shield case, and an intermediate partial shield case. Is mechanically held in between. And the heat generated by the dielectric resonance element is
From both end sides, the heat is transmitted through the first support plate and the second support plate, and is transmitted to the intermediate partial shield case, the first partial shield case, and the second partial shield case, and is radiated.

[0009]

According to the present invention, the dielectric resonator element is mechanically fixed and supported between the first support plate and the second support plate from both ends in one shield case. The fixing of the body resonance element does not require a process such as welding by firing of an adhesive or glass glaze, and the assembly is easy, and the time required for assembly is greatly reduced. The generated heat is also radiated from both ends thereof, and the heat generated in the dielectric resonance element is transmitted to the shield case with good radiation efficiency and is radiated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show a longitudinal sectional view and an exploded perspective view of an embodiment in which the present invention is applied to a TE _01δ mode dielectric resonator. The input / output coupling structure of the dielectric resonator employs a conventionally known structure (not shown).

The dielectric resonator shown in FIGS. 1 and 2 includes a TE _01δ mode dielectric resonator element 11 having a through hole 11a in the axial center _{thereof, and} a dielectric resonator element 11 in an intermediate partial shield case 12 having openings at both ends. , The first support plate 13 and the second support plate 14
To cover the openings at both ends of the intermediate partial shield case 12, respectively.
5 and the second partial shield case 16 are fixed to the intermediate partial shield case 12.

The first support plate 13 is made of, for example, a ceramic material having a low dielectric constant and substantially the same expansion coefficient as the dielectric resonator element 11, has a hole 13a at the center, and has a peripheral portion 13b at the middle. Of the partial shield case 12 at one open end thereof. The second support plate 14 is also made of the same material as the first support plate 13, and has a hole 14a at the center and a peripheral edge 14b formed at the other open end of the intermediate partial shield case 16. It fits into the part 18.

A hole 13a in the first support plate 13, a through hole 11a in the dielectric resonator element 11, and a hole 14a in the second support plate 14 are provided between the first support plate 13 and the second support plate 14.
And the dielectric resonance element 11 is disposed between the first support plate 13 and the second support plate 14 by fixing screws 21 and 22 as follows. ing.

That is, the holes 13a of the first support plate 13
From the through hole 11a of the dielectric resonance element 11
Further, another fixing screw 22 is inserted through the hole 14a of the second support plate 14 into the through hole 11a of the dielectric resonance element 11, and the male screw portion 21a of the fixing screw 21 is further fixed. By screwing the dielectric resonance element 11 into the female screw portion 22a of the screw 22, the dielectric
, And is held in the intermediate partial shield case 12. Each of the fixing screws 21 and 22 is connected to the first support plate 13 and the second support plate 13.
Like the support plate 14, the support plate 14 is made of, for example, a resin material having a low dielectric constant and substantially the same expansion coefficient as the dielectric resonator element 11.

.., 23 (see FIG. 2) are formed at one open end of the intermediate partial shield case 15, and the first partial shield case 15 is covered over the open end. , Holes 15b,... Formed in the flange portion 15a at the open end of the first partial shield case 15.
, 24 are screwed into the screw holes of the intermediate partial shield case 12, and the first partial shield case 15 is fixed to one open end of the intermediate partial shield case 12. I have. Similarly, four screw holes (not shown in FIG. 2) are also formed at the other open end of the intermediate partial shield case 12, and the second partial shield case 16 is covered over this open end. , Second
Flange 16a at the open end of partial shield case 16
, 2 in the holes 16b,.
4 are screwed into the screw holes 23,..., 23 of the intermediate partial shield case 12, and the second partial shield case 16 is fixed to the other open end of the intermediate partial shield case 12.

With such a configuration, the dielectric resonance element 11 is provided in one shield case constituted by the intermediate partial shield case 12, the first partial shield case 15, and the second partial shield case 16. From both ends,
It is mechanically fixed and supported between the first support plate 13 and the second support plate 14 without using an adhesive or glass glaze. Therefore, a process such as welding by firing of an adhesive or glass glaze is not required for fixing the dielectric resonance element 11, so that assembly is simple and the time required for assembly is greatly reduced.

The heat generated by the dielectric resonance element 11 is supplied from both ends thereof to the first support plate 13 and the second support plate 14.
The heat is dissipated through. For this reason, the heat generated in the dielectric resonance element 11 is transmitted to the shield case with good heat radiation efficiency and is radiated.

The present invention uses the T as described in the above embodiment.
The present _{invention is} not limited to the dielectric resonator of the _E01δ mode, and can be applied to dielectric resonators of other modes.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of a dielectric resonator according to the present invention.

FIG. 2 is an exploded perspective view of the dielectric resonator of FIG.

FIG. 3 is a longitudinal sectional view of an example of a conventional dielectric resonator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Dielectric resonance element 11a Through-hole 11b Peripheral edge 12 Intermediate partial shield case 13 First support plate 13a Hole 13b Peripheral edge 14 Second support plate 14a Hole 15 First partial shield case 15a Flange portion 15b Hole 16 Second Partial shield case 16a Flange 16b Hole 17 Step 18 Step 21 Fixing screw 21a Screw 22 Fixing screw 22a Screw 23 Screw hole 24 Screw

Claims (1)

(57) [Scope of request for utility model registration] 1. A dielectric resonance element having a through hole is supported by a support means inside an intermediate partial shield case having openings at both ends, and the dielectric resonance element covers the openings at both ends of the intermediate partial shield case. A dielectric resonator in which a first partial shield case and a second partial shield case are fixed to the intermediate partial shield case, wherein the support means has a hole and a peripheral edge is the intermediate partial shield case. A first low-permittivity material held between one open end of the case and the first partial shield case.
A support plate, a second support plate having a hole and having a peripheral portion held between the other open end of the intermediate partial shield case and the second partial shield case and made of a low dielectric constant material; Are inserted through the hole of the first support plate, the through-hole of the dielectric resonance element, and the hole of the second support plate with the dielectric resonance element interposed therebetween, and connect the dielectric resonance element to the first support plate and the second support plate. A dielectric member fixed between the support plate and the support plate, the dielectric member comprising a low dielectric constant material.