JPS63113304U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of this invention, showing the state after resonance frequency adjustment, and FIG.
The figure is a cross-sectional view for explaining a conventional resonant frequency adjustment structure, and FIG. 3 is a cross-sectional view showing the state before adjusting the resonant frequency in the embodiment of FIG. 1. In the figure, 1 is a conductive case, 2 is a dielectric,
11 is a through hole, 11a is a small diameter portion, 11b is a stepped portion, 11c is a large diameter portion, 12 is an O-ring as a ring made of an elastic material, 13a is a ring constituting a fixing member, 13b is a fixing screw, and 13c is a knob. Part 14 indicates a tuning rod.

Claims (1)

[Claims for Utility Model Registration] (1) A dielectric resonator comprising a conductive case and a dielectric body housed in the conductive case so that the end thereof is in contact with the inner wall of the conductive case. In the resonant frequency adjustment structure, a through hole is formed in a portion of the conductive case that is in contact with the dielectric end surface, and the through hole is configured to
It has a small diameter portion with a relatively small diameter on the inner wall side, and a large diameter portion with a relatively large diameter formed on the outer wall side separating the small diameter portion and the stepped portion, and the inner circumferential surface of the large diameter portion a ring made of an elastic material, at least a portion of which is formed with an internal thread, has an outer diameter larger than the small diameter portion and smaller than the large diameter portion, and is housed in the large diameter portion; A tuning rod made of a conductive or dielectric material, which has an outer diameter smaller than the small diameter portion, is inserted into the through hole, and is inserted into the ring; extrapolated to the tuning rod so as to be movable;
and a fixing member formed on at least a part of the outer peripheral surface with a male thread to be screwed into the female thread of the large diameter part, and a distal end surface of the fixing member provides a connection between the small diameter part and the large diameter part of the through hole. A resonant frequency adjustment structure for a dielectric resonator, wherein the tuning rod is fixed at a predetermined position by the ring that is pressed into contact with the stepped portion and deformed. (2) The fixing member includes a fixing screw having a male thread formed on the outer circumferential surface, and a fixing screw provided separately from the fixing screw, and the fixing member is fitted onto the tuning rod between the fixing screw and the ring. Resonance of a dielectric resonator according to claim 1, which is formed so that the fixing screw side and ring side surfaces are in a plane substantially perpendicular to the axial direction of the tuning rod. Frequency adjustment structure. (3) The resonant frequency adjustment structure for a dielectric resonator according to claim 1 or 2, wherein the tuning rod, the ring, and the fixing member are formed to have conductive surfaces. (4) The resonant frequency adjustment of a dielectric resonator according to any one of claims 1 to 3 of the utility model registration claim, wherein the step portion is constituted by an annular slope opening toward the outside. structure.