Multi-frequency multiplication double stop-band filter

Abstract

The invention provides a multi-frequency multiplication double stop-band filter, solving the problem that the passband bandwidth of a normal stop-band filter is relatively narrow and a multi-frequency multiplication ultra wide band stop-band filter multi frequency multiplication is difficult to realize. The multi-frequency multiplication double stop-band filter is characterized in that a coupling rod (2) is connected with a plurality of parallel resonators (6) to form a first stop-band filter; the resonators (6) are normalized frequency generators, and are used for generating frequency signals in a cavity (1); the coupling rod (2) is a plurality of serial normalized couplers; the coupling rod (2) is connected with a second stop-band filter through a microstrip line (4); the second stop-band filter is formed by a plurality of serial and parallel LC resonators (5); and the output of the first stop-band filter is transmitted to the LC resonators (5) of the second stop-band filter again through the microstrip line (4).

Description

Technical field: [0001] The present invention relates to stopband filters. Background technique: [0002] If a conventional stopband filter needs to have two stopbands in the same passband, two filters are required to achieve it, and it is also easy to appear that the multi-octave harmonics of the first stopband will appear in the other stopband filter In the band, it is difficult to realize the multi-frequency double stop-band filter if the conventional method is used. Some existing conventional filters mainly have the following characteristics: [0003] 1. Some stop-band filters on the market are a single stop-band filter, and there is no characteristic of two stop-band filters in the same passband. [0004] 2. Conventional stop-band filters have a relatively narrow passband bandwidth, and it is difficult to realize multi-multiplier ultra-wideband stop-band filters. Invention content: [0005] The object of the present invention is to provide a multi-octave double stop...

AI Technical Summary

Problems solved by technology

[0002] If a conventional stopband filter needs to have two stopbands in the same passband, two filters are required to achieve it, and it is also easy to appear that the multi-octave harmonics of the first stopband will appear in the other stopband filter In the band, it is difficult to realize the multi-frequency double stop-band filter if the conventional method is used. Some existing conventional filters mainly have the following characteristics:

[0003] 1. Some stop-band filters on the market are a single stop-band filter, and there is no characteristic of two stop-band filters in the same passband

[0004] 2. Conventional stop-band filters have a relatively narrow passband bandwidth, and it is difficult to realize multi-multiplier ultra-wideband stop-band filters

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