A reconfigurable high-rejection dual-band band-stop filter

Abstract

The invention discloses a reconfigurable high-suppression dual-band band-stop filter, which is characterized in that it includes a 50Ω microstrip line, a class A notch unit and a class B notch unit, and the class A notch unit and the class B notch unit The wave unit is electrically coupled and connected to the 50Ω microstrip line, and the coupling distance is d1. Multiple notch units are distributed and coupled through 50Ω microstrip lines, with compact structure, small size and passband insertion loss. The frequency and bandwidth of the two notch bands of the reconfigurable high-suppression dual-band band-stop filter of the present invention can be adjusted independently, and the notch band has a high suppression degree and a large tuning range. At the same time, it provides an intelligent suppression solution for connecting the interference analysis unit of the communication system.

Description

technical field [0001] The present invention relates to the technical field of microwave devices, relates to microwave band rejection filter technology, in particular to a reconfigurable high-suppression dual-band rejection filter and a filter reconstruction technology based on the filter. Background technique [0002] In broadband and ultra-wideband radar and communication systems, one or more interference signals usually have a great impact on the performance of the system, and even make the system unable to work normally. In order to suppress the interference signal, it is necessary to introduce a notch band at the corresponding frequency of the interference signal. [0003] In addition, there are many situations in which the frequency of the interfering signal is fixed or changes with time. Therefore, a band-stop filter with reconfigurable frequency and bandwidth is required. At present, existing reconfigurable band-stop filters are mainly used to suppress interference...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is that the notch devices used to solve the interference signals of broadband, ultra-wideband radar and communication systems by notch methods are fixed and cannot be adjusted, and / or the size / insertion loss is relatively large , and / or low notch band suppression, and / or narrow adjustable range, and / or complex processing and assembly, and / or difficulty in circuit integration and miniaturization, etc.

Images