JPH05110320A - Dielectric resonator device - Google Patents

Abstract

PURPOSE:To support the dielectric resonance element firmly without giving damage thereto even when the device provided with the dielectric resonance element is vibrated or its ambient temperature is fluctuated by devising the device such that the dielectric resonance element is arranged horizontally. CONSTITUTION:The dielectric resonance elements are supported by a pillar shaped shaft 3 inserted in a throughhole of the dielectric resonator elements 2 and supported by a shield case and by a cylindrical electric insulation member 4 interposed between the dielectric resonator elements 2 in the dielectric resonator device in which the cylindrical dielectric resonator elements 2 are arranged in the shield case 1, and the 1st and 2nd electric insulation rings 5, 6 having a throughhole inserted to the shaft 3 respectively are interposed between the shield case 1 and the dielectric resonator elements 2 so that they are arranged to both sides of the dielectric resonator elements 2.

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 capable of supporting a dielectric resonant element by making the axial direction of the dielectric resonant element horizontal.

[0002]

2. Description of the Related Art Conventionally, a cylindrical dielectric resonant element 201
In a dielectric resonator device (hereinafter, referred to as a first conventional example) that has a TE _{01 δ} mode and has a dielectric resonance at the center of a rectangular parallelepiped shield case 200, as shown in FIG. The element 201 is fixed on the support base 202 by glass welding or by bonding with a resin.

However, in the first conventional example, when the ambient temperature of the device fluctuates, stress is generated in the welded portion or the adhesive portion due to the difference in linear expansion coefficient between the dielectric resonant element 201 and the support 202. Since the dielectric resonant element 201 may be damaged, it is necessary that the dielectric resonant element 201 and the support 202 have substantially the same linear expansion coefficient, which limits the selection of the material of the support 202. was there. Further, since the strength of the welded portion or the bonded portion is small, in the case of the relatively heavy dielectric resonant element 201, the dielectric resonant element 201 is used for the purpose of reducing the floor area to be occupied.
However, there is a problem in that the dielectric resonance element cannot be supported (hereinafter, referred to as "horizontal placement") with its axial direction horizontal.

In order to solve these problems, a dielectric resonator device that supports a cylindrical dielectric resonant element 102 using a shaft 112 (hereinafter referred to as a second conventional example).
Is disclosed in Japanese Utility Model Publication No. 57-26401,
This device is shown in FIGS.

As shown in FIGS. 5 and 6, the dielectric resonance element 102 is supported at the center of the shield case 101 by using a shaft 112 made of, for example, a synthetic resin, and is provided on both sides of the dielectric resonance element 102. , An input-side exciter 103 and an output-side exciter 1 each made of metal or dielectric
04 is provided, and each exciter 103, 104 has a terminal 10
5, 106 are connected. Further, an insulator 107 having a U-shaped cross section and insulators 108 and 109 form a shield case 101 having an upper surface opening, and a dielectric resonant element 102 is horizontally disposed inside the shield case 101. Here, the dielectric resonance element 102 has a through hole, the shaft 112 is passed through this hole, and the insulating washer 11 is passed through the shaft 112 so as to be located on both sides of the dielectric resonance element 102.
It is fixed to both side surface portions of the insulator 107 via 0 and 111.

[0006]

However, in the above-mentioned second conventional example, since the dielectric resonance element 102 is fixed without any gap by using the insulating washers 110 and 111 and the shaft 112, the apparatus is horizontal. There is a problem that the dielectric resonant element 102 may be damaged when it is vibrated in the vertical or vertical direction.

The object of the present invention is to solve the above problems and to allow a dielectric resonator element to be arranged horizontally, and further, when a device equipped with the dielectric resonator element vibrates or the ambient temperature fluctuates. Even so, it is an object of the present invention to provide a dielectric resonator device capable of supporting a dielectric resonant element firmly and without damage.

[0008]

A dielectric resonator device according to a first aspect of the present invention is a dielectric resonator device in which a cylindrical dielectric resonant element is arranged in a shield case. The dielectric resonant element is supported by a columnar shaft inserted into the through hole of the body resonant element and supported by a shield case, and a tubular electrical insulating member interposed between the dielectric resonant element. , First and second electrically insulating rings each having a through-hole inserted in the shaft are respectively interposed between the shield case and the dielectric resonant element so as to be arranged on both sides of the dielectric resonant element. It is characterized by

A dielectric resonator device according to a second aspect is the dielectric resonator device according to the first aspect, wherein the dielectric resonator device is interposed between the shield case and one end portion of the shaft, and the shaft is the dielectric resonator device. A second elastic member that urges the body resonance element in the axial direction and a second elastic member that is interposed between the shield case and one end of the electric insulating ring to urge the electric insulating ring in the axial direction. And an elastic member.

Further, the dielectric resonator device according to a third aspect is the dielectric resonator device according to the first aspect, wherein the electrically insulating member has an axial direction longer than an axial length of the dielectric resonant element. A plurality of taper members each having an end surface perpendicular to the axial direction at both ends of the cylinder and having tapered end surfaces corresponding to each other at the end portions contacting each other. And at least one of the second electric insulating rings has a through hole that is inserted into the shaft and has a larger outer diameter than the outer diameter of the cylinder of the electric insulating member. A second ring having a through hole that is inserted into the first ring, and is inserted between the shield case and one end of the shaft, and the shaft is arranged in the axial direction of the dielectric resonant element. Energize The first elastic member is interposed between the shield case and one end portion of the first ring, and biases the first ring in the axial direction to move the plurality of taper members in the axial direction. A second elastic member that biases the second ring in the axial direction, and a third elastic member that is interposed between the shield case and one end of the second ring to bias the second ring in the axial direction. It is characterized by having.

[0011]

In the dielectric resonator device according to claim 1,
The dielectric resonant element is supported by a tubular electrical insulating member interposed between the shaft and the dielectric resonant element, and the first and second electrical insulating rings are provided on both sides of the dielectric resonant element. Since they are inserted between the shield case and the dielectric resonant element, respectively, the dielectric resonant element can be placed horizontally. Moreover, even when the device vibrates, the electric insulation member can absorb the vibration, and
The dielectric resonant element can be supported firmly and without damage. Further, since the electric insulating member is interposed between the dielectric resonant element and the shaft,
Even when the ambient temperature of the device changes, the difference in linear expansion between the two can be absorbed by the electrical insulating member, and damage to the dielectric resonant element and the shaft can be prevented.

In the dielectric resonator device according to the second aspect, the shaft, the insulating ring and the dielectric resonant element are biased in the axial direction by the first and second elastic members. In particular, even if there is vibration in the axial direction, the vibration can be absorbed, and thus the dielectric resonant element and the shaft can be supported without damage.

Further, in the dielectric resonator device according to the third aspect, the shaft, the first and second rings of the insulating ring, and the dielectric resonance are provided by the first, second, and third elastic members. Since the element is biased in the axial direction, the vibration can be absorbed even when there is vibration in the axial direction, thereby supporting the dielectric resonant element and the shaft without damage. be able to. Further, the plurality of taper members are urged in the axial direction by the second elastic member via the first ring, but the plurality of taper members are mutually attached to the end portions in contact with each other as described above. Since it has a corresponding tapered end face, a stress perpendicular to the axial direction is generated by the tapered end face, and the dielectric resonant element can be more firmly supported.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 is a vertical sectional view of a dielectric resonator device according to a first embodiment of the present invention.
The dielectric resonator device according to the first embodiment is a dielectric resonator device that includes a dielectric resonant element 2 and uses the TE _{01 δ} mode, and has a cylindrical inner surface and a cylindrical shape. The dielectric resonance element 2 is positioned and supported in the vertical direction by a cylindrical bush 4 coaxially inserted between the dielectric resonance element 2 and the shaft 3, and is arranged on both sides of the dielectric resonance element 2 in the axial direction. Insulating rings 5 and 6 in which the through holes of the insulating rings 5 and 6 are passed through the shaft 3, one end surface 3b of the shaft 3, and the inner wall surface 1 of the left side of the shield case 1 in the figure.
a coil spring 11 arranged between the end surface of the insulating ring 6 and the side wall inner surface 1b of the shield case 1 to urge the insulating ring 6 in the horizontal direction. It is characterized in that the dielectric resonant element 2 is positioned and supported in the horizontal direction by the coil spring 12.

As shown in FIG. 1, in the central portion of the shield case 1 of a rectangular parallelepiped cavity made of metal, for example, a cylindrical dielectric resonance made of a ceramic dielectric material in which ZrSn is mixed with TiO ₂ as a main component. The element 2 is formed by a cylindrical shaft 3 made of an electrically insulating material having a relatively high Q, which is coaxially inserted into a through hole in the cylinder of the dielectric resonance element 2 through a cylindrical bush 4. It is supported and fixed. Here, one end surface 3a of the shaft 3 is inserted into a circular recess 1h formed in the center of the side wall inner surface 1a on the right side of the shield case 1 in the figure, and the other end surface 3b is the other end surface 3b and the side wall of the shield case 1. A plurality of coil springs 11 inserted between the inner surface 1b and the inner surface 1b urges the shaft 3 from the left side to the right side in the axial direction of the shaft 3, whereby the shaft 3 is supported and fixed.

The bush 4 coaxially inserted between the dielectric resonant element 2 and the shaft 3 is made of an electrically insulating material such as Teflon resin or ceramic.

Further, the cylindrical insulating rings 5 and 6 made of an electrically insulating material having a relatively high Q have their through holes passed through the shaft 3 so that both sides of the dielectric resonant element 2 in the axial direction are covered. Is arranged coaxially with the shaft 3 and is slidable in the axial direction. Here, the insulating ring 5 is inserted between the side wall inner surface 1 a and the dielectric resonant element 2 and the bush 4. On the other hand, the insulating ring 6 includes the sidewall inner surface 1b, the dielectric resonance element 2,
It is located between the bush 4 and one end surface thereof is biased in the axial direction of the shaft 3 from the left side to the right side in the figure by a plurality of coil springs 12 inserted between the bush 4 and the side wall inner surface 1b of the shield case 1. It As a result, the dielectric resonance element 2 and the insulating ring 5 are biased in the axial direction of the shaft 3 from the left side to the right side in the figure, and are fixed and positioned at a predetermined axial position.

In this embodiment, the coil springs 11 and 12 are separated from each other by a predetermined distance from the position on the inner surface 1b of the side wall and corresponding to the axial center of the shaft 3, and are centered at the position. It is provided at each position at an angle of 90 degrees, and one end of each of them is inserted and fixed in a circular hole (not shown) formed in the side wall inner surface 1b.

As described above, in the first embodiment, the dielectric resonant element 2 is positioned in the vertical direction by the bush 4 inserted between the dielectric resonant element 2 and the cylindrical shaft 3. Insulating rings 5 and 6 that are supported and supported on both sides of the dielectric resonant element 2 in the axial direction, a coil spring 11 that biases the shaft 3 in the horizontal direction, and the insulating ring 6 in the horizontal direction. With the coil spring 12,
Since the dielectric resonant element 2 can be positioned and supported in the horizontal direction, the dielectric resonant element 2 can be laterally supported and thus the floor area to be occupied can be reduced. Further, even when the dielectric resonator device vibrates in the horizontal direction or the vertical direction, the coil springs 11 and 12 and the bush 4 absorb the vibration to prevent the dielectric resonant element 2 from being damaged. it can.

Further, since the bush 4 is inserted between the dielectric resonance element 2 and the shaft 3, even if the ambient temperature of the device fluctuates, the difference in linear expansion between the two is caused by the bush 4. Dielectric resonance element 2 that can absorb
Also, damage to the shaft 3 can be prevented. Therefore, since it is not necessary to match the linear expansion coefficients of the dielectric resonant element 2 and the shaft 3, any material can be selected as the material of the shaft 3 as long as it is an electrically insulating material having a relatively high Q.

Further, the dielectric resonant element 2 is supported by a coil spring 12 horizontally urged through the insulating rings 5 and 6, and the shaft 3 is supported by a coil spring 11 horizontally supported. Therefore, even if the ambient temperature of the device fluctuates, the side wall of the shield case 1 is prevented from being distorted due to the difference in linear expansion coefficient between the shaft 3 and the insulating rings 5 and 6 and the shield case 1. be able to.

<Second Embodiment> FIG. 2 is a vertical sectional view of a dielectric resonator device according to a second embodiment of the present invention.
The same parts as those in FIG. 1 are designated by the same reference numerals.

The dielectric resonator device of the second embodiment is
The difference from the first embodiment is that (a) instead of the bush 4, five substantially cylindrical taper rings 21, 22, 23, 24, 25 made of the same material as the bush 4 are provided. And (b) instead of the insulating ring 6, cylindrical insulating rings 7 and 8 made of an electrically insulating material are provided,
Accordingly, instead of the coil spring 12, the coil spring 1
3 and 14 are provided. Hereinafter, the difference will be described in detail.

As shown in FIG. 2, the taper rings 21 to 25 have the shafts 3 inserted in the through holes in the order of the taper rings 21 to 25 and interposed between the dielectric resonant element 2 and the shaft 3. Thus, it has a cylindrical shape having a length in the axial direction longer than the length in the axial direction of the dielectric resonant element 2 at the time of the insertion arrangement. Here, the taper ring 21 has one end face in a direction perpendicular to the axial direction, and the outer diameter of the cylinder decreases toward the tip end of the other end face opposite to the one end face and becomes the inner circumference diameter at the tip end. In addition, the taper ring 22 has a taper-shaped other end surface that closely adheres to one end surface of the taper ring 22.
Further, the taper ring 22 has a taper-shaped one end surface which is in close contact with the other end surface of the taper ring 21 and has a cylindrical outer peripheral diameter that increases toward the tip of the one end surface and becomes the outer peripheral diameter at the tip. The taper ring 23 has a taper-shaped other end surface that is in close contact with one end surface of the taper ring 23 and has a cylindrical outer peripheral diameter that increases toward the tip portion of the other end surface and that has the maximum diameter at the tip portion. Further, the taper ring 23 has a tapered one end surface which is in close contact with the other end surface of the taper ring 22 and has a cylindrical outer peripheral diameter that decreases toward the tip of the one end surface and has an inner peripheral diameter at the tip. At the same time, the taper ring 24 has a taper-shaped other end face which is in close contact with one end face of the taper ring 24 and has a cylindrical outer peripheral diameter that decreases toward the tip end of the other end face and has an inner peripheral diameter at the tip end. The taper ring 24 has the same shape as the taper ring 22.
Further, although the taper ring 25 has a shape similar to that of the taper ring 21, the taper ring 21 is axially aligned with the taper ring 21 so that the taper end surface of the taper ring 25 closely contacts the taper end surface of the taper ring 24. The shafts 3 are inserted and arranged in opposite directions.

Further, the insulating ring 7 is a taper ring 21.
25 to 25, the shaft 3 is passed through the through hole, and the insulating ring 8 is connected to the insulating ring 7.
The insulating ring 7 has a longer axial length than that of the insulating ring 7, and the insulating ring 7 is inserted between the insulating ring 8 and the shaft 3 at this time. 8 can be slid separately in the axial direction. Here, one end face of the insulating ring 7 contacts the one end face of the tapered ring 21, and one end face of the insulating ring 8 contacts the one end face of the dielectric resonant element 2. On the other hand, the other end surface of the insulating ring 7 is biased in the axial direction of the shaft 3 from the left side to the right side in the drawing by a plurality of coil springs 13 inserted between the insulating ring 7 and the side wall inner surface 1b of the shield case 1, and The other end surface of the ring 8 is biased in the axial direction of the shaft 3 from the left side to the right side in the drawing by a plurality of coil springs 14 inserted between the ring 8 and the side wall inner surface 1b of the shield case 1. The taper ring 2
Since the length of the cylinders 1 to 25 in the axial direction is longer than that of the dielectric resonant element 2, the insulating ring 7 is axially interposed between the insulating rings 7 and 8, the dielectric resonant element 2 and the taper ring 21. A space 9 for sliding is formed.

By the biasing by the coil springs 13 and 14, the dielectric resonant element 2 and the insulating ring 5 are biased in the axial direction of the shaft 3 from the left side to the right side in the figure and fixed at a predetermined axial position. Be positioned. Further, when the insulating ring 7 is biased in the horizontal direction by the coil spring 13 as described above, the taper rings 21 to 25 are biased in the horizontal direction indicated by the arrow 51 and compressed. Each taper ring 21 to 2
Since 5 has a tapered end surface, stresses in the directions of arrows 61 and 62 that are perpendicular to the axial direction and opposite to each other are generated. As a result, the dielectric resonant element 2 is fixed and positioned at a predetermined position in the direction perpendicular to the axial direction, and the dielectric resonant element 2 can be supported more firmly.

In the present embodiment, the coil springs 13 and 14 are separated from each other by a predetermined distance from the position on the inner surface 1b of the side wall corresponding to the axial center of the shaft 3 and, for example, with respect to the position. It is provided at each position at an angle of 90 degrees, and one end of each of them is inserted and fixed in a circular hole (not shown) formed in the side wall inner surface 1b.

The dielectric resonator device according to the second embodiment is
In addition to being able to more firmly support the dielectric resonant element 2 as described above, it has the same unique effect as that of the first embodiment.

In the above second embodiment, the taper rings 21 to 25 are used, but instead of this, FIG.
A cylindrical bellows member 40 made of, for example, Teflon (trademark) or polyethylene resin may be used. In the same manner as described above, the insulating ring 7 is moved by the coil spring 13 so that
When biased in the direction of, the stress is generated in the direction 72 perpendicular to the axial direction from each inner peripheral bent portion of the cylindrical bellows member 40 that contacts the shaft 3 to the shaft 3, and the stress also contacts the dielectric resonance element 2. Stress is generated in a direction 71 perpendicular to the axial direction from each outer peripheral bent portion of the cylindrical bellows member 40 toward the dielectric resonance element 2. As a result, the dielectric resonant element 2 is fixed and positioned at a predetermined position in the direction perpendicular to the axial direction.

<Other Embodiments> In the above embodiments, the dielectric resonance element 2, the shaft 3, the bush 4, the taper rings 21 to 25, and the insulating rings 5, 6, 7, and 8 are cylindrical. Although it has a shape or a substantially cylindrical shape, the present invention is not limited to this and may be formed in other tubular shapes such as a rectangular tubular shape.

[0032]

As described in detail above, according to the dielectric resonator device of the first aspect of the present invention, the tubular electric insulating member is interposed between the shaft and the dielectric resonant element. Since the dielectric resonant element is supported, and the first and second electric insulating rings are respectively interposed between the shield case and the dielectric resonant element so as to be arranged on both sides of the dielectric resonant element, The dielectric resonant element can be arranged horizontally. As a result, the area occupied by the device can be made smaller than that in the case of vertical installation. Further, even when the device vibrates, the vibration can be absorbed by the electric insulating member, whereby the dielectric resonant element can be supported firmly and without damage. Further, since the electric insulating member is interposed between the dielectric resonant element and the shaft, even if the ambient temperature of the device fluctuates, the difference between the linear expansions of the two is not affected by the electric insulating member. It is possible to prevent the damage to the dielectric resonance element and the shaft.

In the dielectric resonator device according to the second aspect, the shaft, the insulating ring, and the dielectric resonant element are biased in the axial direction by the first and second elastic members. In particular, even if there is vibration in the axial direction, the vibration can be absorbed, and thus the dielectric resonant element and the shaft can be supported without damage.

Further, in the dielectric resonator device according to a third aspect of the present invention, the shaft, the first and second rings of the insulating ring, and the dielectric resonance are provided by the first, second and third elastic members. Since the element is biased in the axial direction, the vibration can be absorbed even when there is vibration in the axial direction, thereby supporting the dielectric resonant element and the shaft without damage. be able to. Further, the plurality of taper members are urged in the axial direction by the second elastic member via the first ring, but the plurality of taper members are mutually attached to the end portions in contact with each other as described above. Since it has a corresponding tapered end face, a stress perpendicular to the axial direction is generated by the tapered end face, and the dielectric resonant element can be more firmly supported.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a dielectric resonator device according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of a dielectric resonator device according to a second embodiment of the present invention.

3 is a vertical cross-sectional view of a cylindrical bellows member used in place of the taper ring of FIG.

FIG. 4 is a vertical sectional view of a first conventional dielectric resonator device.

FIG. 5 is a plan view of a second conventional dielectric resonator device with a shield case removed.

6 is a vertical cross-sectional view taken along the line BB ′ of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Shield case, 2 ... Dielectric resonance element, 3 ... Shaft, 4 ... Bushing, 5, 6, 7, 8 ... Insulating ring, 11, 12, 13, 14 ... Coil spring, 21, 22, 23, 24, 25 ... Taper ring.

Claims (3)

[Claims] 1. A dielectric resonator device in which a cylindrical dielectric resonant element is arranged in a shield case, wherein a pillar-shaped shaft inserted into a through hole of the dielectric resonant element and supported by the shield case. And the first and second electrical insulating rings that support the dielectric resonant element by a tubular electrical insulating member that is inserted between the dielectric resonant element and the through holes that are respectively inserted into the shafts. A dielectric resonator device comprising: a dielectric resonator element disposed between the shield case and the dielectric resonant element so as to be disposed on both sides of the dielectric resonant element. 2. A first elastic member which is interposed between the shield case and one end of the shaft and biases the shaft in the axial direction of the dielectric resonant element, the shield case and the electrical insulation. 2. A second elastic member which is interposed between the ring and one end of the ring and biases the electric insulating ring in the axial direction.
A dielectric resonator device as described. 3. The electrically insulating member has a tubular shape having an axial length longer than an axial length of the dielectric resonant element, and has end faces perpendicular to the axial direction at both ends of the tubular member. And at least one of the first and second electric insulating rings has a penetrating member inserted into the shaft. The shield comprises a first ring having a hole and having an outer diameter larger than the outer diameter of the cylinder of the electrical insulating member, and a second ring having a through hole inserted into the first ring, A first elastic member interposed between the case and one end of the shaft to urge the shaft in the axial direction of the dielectric resonant element; and the shield case and one end of the first ring. Intervened between Biasing the first ring in the axial direction,
A second elastic member for urging the plurality of taper members in the axial direction, and a second elastic member interposed between the shield case and one end portion of the second ring to apply the second ring in the axial direction. The dielectric resonator device according to claim 1, further comprising: a third elastic member that biases the elastic member.