Dielectric resonator, assembly method and dielectric filter

Abstract

A dielectric resonator, an assembly method thereof and a dielectric filter make well contact between a dielectric resonant column and a metal cavity and thus the performance of the filter is improved. The dielectric resonator comprises the dielectric resonant column, the metal cavity, a sealing cover plate and a tuning screw, wherein the dielectric resonant column is located in the metal cavity, the sealing cover plate is located on the upper end face of the metal cavity, and the tuning screw is located on the sealing cover plate. The dielectric resonator also comprises an insulating fixed module located between the lower end face of the sealing cover plate and the upper end face of the dielectric resonant column, and the insulating fixed module is high enough to ensure that pressure is formed between the sealing cover plate and the dielectric resonant column, so that the dielectric resonant column is fixed at the bottom of the metal cavity. The dielectric resonant column is fixed at the bottom of the metal cavity through the insulating fixed module without welding in an embodiment of the present invention, and then well contact between the dielectric resonant column and the metal cavity can be ensured, so that the performance and reliability of the dielectric filter are improved.

Description

technical field [0001] The invention relates to a filter technology, in particular to a dielectric resonator, an assembly method thereof, and a dielectric filter. Background technique [0002] When the electromagnetic wave propagates in a material with high dielectric constant, its wavelength will become shorter. Taking advantage of this characteristic, dielectric materials can be used instead of traditional metal materials. Under the same index, the volume of the filter can be reduced. Research on dielectric filters has always been a hot spot in the communication industry. Filters are important components of wireless communication products, and dielectric filters are of great significance to the miniaturization of communication products, especially the importance of dielectric resonators that make up dielectric filters is self-evident. [0003] Usually single-ended conductive dielectric resonator see figure 1 As shown, it is mainly composed of a dielectric resonance colum...

AI Technical Summary

Problems solved by technology

The specific implementation process of this patent involves complex assembly process, high requirements for structural design, and relatively large impact on performance, which is not conducive to mass production and high cost

Images