A high-power waveguide tuned filter

Abstract

The invention relates to a high-power waveguide tuning filter in the communication field, which is suitable for a transmission device for suppressing out-of-band interference signals in channels of a C-band communication system. The invention includes a waveguide resonant cavity, a coupling mechanism, a tuning inner conductor, a choke guiding mechanism and a transmission mechanism, wherein the coupling mechanism is composed of an input-output coupling mechanism and an inter-cavity coupling mechanism. The transmission signal enters the input-output coupling mechanism from the waveguide entrance, passes through the waveguide resonant cavity and the inter-cavity coupling mechanism in sequence, and then outputs from the waveguide exit; the tuning inner conductor enters the waveguide resonant cavity from the narrow side of the waveguide through the choke guide mechanism, and is synchronized by the transmission mechanism Changing the depth of the tuning inner conductor into the waveguide resonant cavity completes the frequency tuning. The invention has high power tolerance, small change in the passband within the adjustable frequency range, and stable performance during forward and reverse frequency modulation, and satisfies the need for communication equipment to withstand large power, small change in the passband within the adjustable frequency range, Requirements for stable performance during forward and reverse frequency modulation.

Description

technical field [0001] The invention relates to the communication field, in particular to a high-power waveguide tuning filter, which is especially suitable for a transmission device for suppressing interference signals outside the working band in the channel of a C-band communication system. Background technique [0002] At present, coaxial cavity electronically tuned filters have been widely used in VHF, UHF, L, C and other bands used in communication systems, which has greatly improved the performance of communication systems, but communication equipment is still moving towards high-power, high-power The direction of performance and high reliability continues to develop. The coaxial cavity electronically tuned filter is easier to realize when the frequency is low. Although it is small in the C-band, its power capacity is limited and it is only suitable for small and medium power applications. The waveguide cavity filter can withstand large power. Through simulation design...

AI Technical Summary

Problems solved by technology

At the same time, in the lower frequency bands, short-circuit reeds are generally used for contact between the resonant cavity of the electric tuning filter and the tuning inner conductor, and the performance is acceptable, but in the frequency bands such as C and X with higher frequencies, it is necessary to make the tuning inner conductor The short-circuit performance between the resonator and the resonator is good, and the tuning inner conductors must be synchronized and the forward and reverse performance is stable during frequency tuning. Therefore, there are strict requirements on the material and processing technology of the short-circuit reed, so a design that can replace the short-circuit A reed structure with stable performance has become a difficult problem for designers

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