Cavity impedance band elimination filter

Abstract

A cavity impedance band elimination filter provided by the present invention comprises a cavity in which a plurality of orderly arranged resonant cavities are arranged, resonators are arranged in the resonant cavities, and each resonator is composed of an oscillation cavity, a conversion cavity, a tube socket, a feed terminal, a bulk effect diode and a dielectric resonance rod. The oscillation cavity is arranged in the radial direction of the tube socket, the conversion cavity is arranged in the axial direction of the tube socket, and the bulk effect diode is arranged at one end of the conversion cavity. The feed terminal is arranged at the other end of the conversion cavity, the dielectric resonance rod is fixed in the oscillation cavity, and transmission lines in a rectangular wave shape are also arranged in the cavity and are connected with the ends of the resonators far away from the feed terminals. By the above mode, and according to the present invention, a power level of outputting a microwave signal and a frequency spectrum purity performance can be improved.

Description

technical field [0001] The invention relates to the technical field of microwave communication, in particular to a cavity impedance band-stop filter. Background technique [0002] Cavity impedance bandstop filter is a key device in microwave communication system. In practical applications, it is often necessary to take appropriate frequency stabilization measures to improve its frequency stability. Among them, high-Q frequency stabilization cavity, injection locking, and phase-locked loop frequency stabilization are three commonly used methods. The widely used frequency stabilization technology is to add a high-Q frequency stabilization cavity to increase the total energy storage of the oscillation circuit, thereby improving the frequency stability of the oscillator. [0003] However, the traditional cavity impedance band-stop filter mostly adopts a reflective high-Q cavity frequency stabilization method, the output power is small, and the frequency stability is generally o...

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Problems solved by technology

[0006] Different from the situation of the prior art, the beneficial effect of the present invention is: by adopting the resonator, it overcomes the problems of large volume, small output power, poor frequency stability and limited Changes in external conditions (such as load, temperature, voltage, etc.) may cause defects such as unstable phenomena such as mode hopping, thereby improving the power level and spectral purity of the output microwave signal

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