Dielectric filter with mixed dielectric resonator

Abstract

The invention discloses a dielectric filter with a mixed dielectric resonator, and solves the problems that the dielectric filter is large in insertion loss and the main resonant frequency is not easy to change. A dielectric filter body is provided with dielectric blocks, coupling holes and coupling dielectric blocks, and the dielectric blocks and the surrounding space form mixed dielectric resonant cavities; the dielectric blocks in the mixed dielectric resonant cavity are single-layer or multi-layer, have different dielectric constants and are combined with any geometric structures; the coupling holes and the coupling dielectric blocks are positioned between the two mixed dielectric resonant cavities; and the outer surface of the dielectric filter is a hard metal plating film or any metal electroplating film. The dielectric filter can be used for high-quality filtering in communication. The dielectric resonator contains two or more than two dielectrics with different dielectric constants and can be combined with various geometric structures. According to the invention, the main resonant frequency can be flexibly controlled, the no-load quality factor of the dielectric resonant cavity is improved, and the cavity loss is reduced. The dielectric filter is used for communication of base stations or satellites and realizes selection of signal receiving and transmitting frequencies.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, satellite communication and radar communication equipment components, in particular to a dielectric filter in a radio frequency microwave transceiver system, in particular to a dielectric filter containing a mixed dielectric resonator, which can be used in wireless communication and radar system radio frequency In the front-end transceiver channel. Background technique [0002] In recent years, with the rapid development of wireless technologies such as new-generation mobile communications, satellite communications, Internet of Things, and new-generation integrated radar systems, the overall communication equipment has become more compact, high-density, low-cost, high-performance, low-latency, and low-power With the wide application of massive MIMO technology, microwave filters in wireless communication systems are also developing towards the direction of miniaturization, high perfor...

AI Technical Summary

Problems solved by technology

[0003] Although many achievements have been made in the research of dielectric filters, a very important industry pain point at present is that dielectric filters have poorer insertion loss compared with traditional metal cavity filters.

Higher insertion loss will affect the system noise figure of the receiver, and for the transmitter, the power of the power amplifier will be attenuated to the filter, thus affecting the transmit power and energy consumption of the transmitter

The large insertion loss of the dielectric filter leads to high overall power consumption of base stations, satellites, and radar systems that use the dielectric filter, which poses a threat to the large-area use of the new generation of base stations, satellites, and integrated radars. had a great impact

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