Dielectric resonator, flexible conductive shielding part and dielectric filter

Abstract

The invention discloses a dielectric resonator, a flexible conductive shielding part and a dielectric filter. The dielectric resonator provided by the embodiment of the invention comprises a dielectric resonance column, a cavity which is provided with the dielectric resonance column and the flexible conductive shielding part, wherein the flexible conductive shielding part seals the cavity to form a resonance cavity, and is flexibly contacted with the dielectric resonance column, so that the upper surface of the dielectric resonance column is directly earthed and conducted through the flexible conductive shielding part. Because the flexible conductive shielding part is adopted to directly seal the cavity to form the resonance cavity, the flexible conductive shielding part replaces the function of an original cover plate so as to reduce product cost; and meanwhile, the upper surface of the dielectric resonance column is directly earthed through the flexible conductive shielding part, so the earthing is more reliable, and the performance index of the dielectric resonator is improved.

Description

technical field [0001] The invention relates to the technical field of dielectric filters, in particular to a dielectric resonator, an elastic conductive shield and a dielectric filter. Background technique [0002] Dielectric filters are designed and manufactured using the characteristics of low loss, high dielectric constant, frequency temperature coefficient and thermal expansion coefficient of dielectric ceramic materials, and can withstand high power. It is characterized by low insertion loss and good power resistance. [0003] see figure 1 , which is a schematic diagram of a TM (transverse magnetic, transverse magnetic) mode dielectric filter, which is mainly composed of a dielectric resonance column 101 and a metal cavity 102 . It is very important that the upper and lower ends of the dielectric resonant column of the resonator in the TM mode dielectric filter are well grounded, otherwise the performance of the filter will be affected. [0004] Another existing diel...

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Problems solved by technology

[0005] In the process of researching the prior art, the inventors of the present invention found that in the prior art, in order to solve the grounding problem on the upper surface of the dielectric resonant column, a conductive elastic body was used to contact the cover plate through the conductive elastic body, and then pass The cavity is grounded, but during the installation process, it is difficult to ensure the close contact between the dielectric resonant column and the reinforcement due to manufacturing defects, uneven force, temperature changes and assembly errors of the reinforcement and the conductive elastomer, and then The upper surface of the dielectric resonant column cannot be reliably grounded

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