JPS59134902A - Fitting device of dielectric resonator - Google Patents

Abstract

PURPOSE:To adjust easily a characteristic of a dielectric resonator by constituting the dielectric resonator that it is formed attachably and detachably or its fitting position is adjusted in a device fitting the dielectric resonator while keeping a prescribed interval with a case or a circuit element in the case. CONSTITUTION:Supports 4 are fixed to the dielectric resonator 1 by an adhesives 3 and a nut 8' is fixed by an adhesives 5, and they are formed incorporatedly. On the other hand, the case 2 as a ground member is provided with the board 6 on which a microwave integrated circuit comprising a microstrip line MSL7 or the like is formed and the MSL7 as a transmission line provided on the board. The position of the dielectric resonator 1 is adjusted three-dimensionally as the inner wall face of the case 2, the MSL7 and the board 6, then the electromagnetic coupling and the phase of coupling are adjusted so as to obtain a prescribed resonance frequency. Since these adjustments are performed minutely in general and executed externally at the outside of the case 2, allowing to improve the working efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a mounting device for a dielectric resonator used in an oscillator, filter, etc.

(2) Background of the technology Dielectric resonators with good temperature stability of the resonant frequency have become available, and dielectric resonators are now being used in oscillators, filters, etc. commonly used in the micro wave and millimeter wave bands. It has become. If a metal conductor is present in the vicinity of a dielectric resonator, its Q characteristic changes, so the dielectric resonator is installed within the case at a predetermined distance from the side wall, bottom, etc. of the metal case. Further, it is preferable that the distance between the transmission line such as a microstrip line and the dielectric resonator can be adjusted in order to set the coefficient 1 phase of electromagnetic coupling between the two to a predetermined value. Furthermore, the dielectric resonator may be replaced, and it is desired to be able to replace it.

(3) Prior Art and Problems A sectional view of a conventional installation when a dielectric resonator is used as an oscillator or a filter is shown in FIG.

In FIG. 1, in addition to the dielectric resonator 1, inside the case 2 are
Microstrip line (hereinafter abbreviated as 'FMSL) 7
etc. are provided on the base material 61'-installed.

The dielectric resonator l is fixed with an adhesive 3 and is attached to a support base 4'.
It is fixedly attached to the base material 6 with an adhesive 5 through the wafer. In order to fully adjust the electromagnetic coupling conditions between MAL7 and resonator l, the positions of resonator l, MSL7, base material 6, inner wall of case 2, etc. are adjusted as appropriate, but once they are bonded as described above, There are problems in that it is no longer possible to adjust the position of the dielectric resonator l, and it cannot be easily attached or detached.

FIG. 2 shows a sectional view of a conventional installation when a dielectric resonator is used as a resonator. In FIG. 2, a dielectric resonator 1 is fixedly attached to a case 2 whose outer surface is electrically conductive via a dielectric support 4' fixed with an adhesive 3 through an adhesive 5. .

Furthermore, this mounting method has the problem that the dielectric resonator 1 cannot be easily removed from the case 2, nor can it be easily remounted.

(4) Purpose of the Invention The purpose of the present invention is to enable easy position adjustment in view of the unique property of a dielectric resonator that its characteristics change depending on its position with respect to nearby circuits or conductors. The purpose is to enable the characteristics to be easily adjusted.

Another object of the present invention is to enable the dielectric resonator to be easily attached or detached.

(5) Structure of the invention In order to achieve the above object of the invention, in the present invention,
A dielectric resonator mounting device for mounting a dielectric resonator while maintaining a predetermined distance from a case or a circuit element within the case, characterized in that the dielectric resonator can be mounted and removed or the mounting position can be adjusted. is provided.

(6) Embodiment of the Invention A first embodiment of the invention will be described with reference to FIGS. 3 and 4. This illustration is with respect to FIG.

In FIGS. 3 and 4, a support base 4 is fixed to the dielectric resonator 1 with an adhesive 3, and a nut 8' is further fixed with an adhesive 5, thereby forming an integral structure. The dielectric constant of the support base 4 is smaller than that of the dielectric resonator 1. On the other hand, the case 2 serving as a ground is provided with a base material 6 on which a microwave integrated circuit including an MSL 7 and the like is formed, and an MSL 7 as a transmission line provided on the base material. Further, the bottom of the case 2 is provided with an opening 2a, into which a bolt 9' is inserted, and which is thicker than the outer diameter of the bolt.

The dielectric resonator l is installed in the case as follows. Pass the bolt 9' all the way through the washer 11 through the opening 2a of the case 2.
Insert it into case 2 from the bottom. The spacer 10 is completely passed through the threaded part inside the case of the bolt 9', and the threaded part is inserted and screwed into the nut 8' which is integrated with the dielectric resonator 1. Thereby, the dielectric resonator 1 is installed inside the case.

This section describes adjustment of the mounting position. Regarding the vertical direction,
This can be done by selecting and using a spacer 10 or the like having an appropriate thickness. The position adjustment in the plane direction can be performed by shifting the inside of the opening 2a, since the opening 2a has an inner diameter sufficiently larger than the outer diameter of the threaded portion of the bolt 9'. By combining both of the above, the position of the dielectric resonator l can be adjusted three-dimensionally within the case.

That is, the dielectric resonator 1 is connected to the inner wall surface of the case 2, MSL
7. The position can be adjusted three-dimensionally with respect to the base material 6, and thereby the degree of electromagnetic coupling and the coupling phase can be adjusted to obtain a predetermined resonance frequency. These adjustments are generally fine adjustments, and the position adjustment in this example can be performed from outside the case 2, which is effective in improving work efficiency.

Furthermore, as is clear from the figure, by removing the cover 21i, the dielectric resonator 1 can be easily removed and attached.

FIG. 5 shows a modification of FIGS. 3 and 4.

A support base 4 is fixed to the dielectric resonator 1 with an adhesive 3, and a flat head bolt such as a hexagonal head screw 9'', for example, is fixed to the support base 4 with an adhesive 5. On the other hand, a nut 8# is provided on the outside of the case 2, into which a bolt 9# is screwed.
The dielectric resonator 1 is attached by screwing into the nut 8'' through the hole 1.The position adjustment, removal, etc. are the same as in FIGS. 3 and 4.

A second embodiment of the present invention will be described with reference to FIG. FIG. 6 is an illustration of the invention relative to FIG.

In FIG. 6, a support base 4 is fixed to the dielectric resonator 1 using an adhesive 3, and a nut 8 is fixed using an adhesive 5.
is fixed. The support base 4 is made of a material having a dielectric constant smaller than that of the dielectric resonator 1. The shape of the dielectric resonator 1 is cylindrical or rectangular parallelepiped. On the other hand, a stud 9 is provided inside the case 2 at approximately the center bottom. The stud 9 is designed to be screwed into the nut 8. That is, the dielectric resonator 1 provided with the nut 8 is installed in the case 2 by inserting and screwing the stud 9 into the nut 8. After installation, the inside of the case 2 is sealed off with a cover 21.

As is clear from the above example, the dielectric resonator 1 can be easily attached/detached and replaced, which is advantageous in the case of supplementary parts 6 and the like.

The present invention can take various modifications in addition to those described above. For example, in the example shown in FIG. 6, a case has been described in which the position is adjusted only in the vertical direction, but the position can be adjusted three-dimensionally as shown in FIGS. 3 to 5. In addition, in the examples shown in FIGS. 3 to 5, the case where the position can be adjusted three-dimensionally has been described, but as shown in FIG. Can be made adjustable. In order to adjust the position, other means other than the combination of bolts and nuts can be used.

(7) Effects of the Invention According to the present invention, the mounting position of the dielectric resonator within the case can be easily adjusted if necessary, and the characteristics can be adjusted. In particular, it can be easily adjusted from outside the case, reducing adjustment time, and it can also be adjusted in the field, for example, when it is incorporated into a communication device.

Another advantage of the present invention is that the dielectric resonator can be easily replaced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a first conventional installation; Fig. 2 is a sectional view of a second conventional installation; Fig. 3 is a sectional view of an installation as a first embodiment of the present invention; FIG. 5 is a diagram showing a modification of FIG. 4, and FIG. 6 is an installation sectional view as a second embodiment of the present invention. (Explanation of symbols) 1... Dielectric resonator, 2...
... Case, 3 ..... Adhesive, 4.4'... Support stand, 5 ..... Adhesive, 6 ..... Base material, 7. Old... MSL. 8, 8', 8"... Nut, 9, 9', 9'... Bolt, 10, 10'... Spacer 11, 11', 11'... Washer. Daughter taste θ ] Taste 3rd side solid 4 rero=:=:ko911 8- Fig. 5 2222 go 11' 2o, F10' Loconi=2=]2 2==Nido 1cho Loroni) 8″

Claims (1)

[Claims] 1. A device for mounting a dielectric resonator at a predetermined distance from a case or a circuit element within the case, characterized in that the dielectric resonator is detachable or the mounting position can be adjusted. Mounting device.