Superconducting filter structure

Abstract

The invention discloses a superconducting filter structure. The superconducting filter structure comprises an L waveband band-pass filter, a P waveband band-pass filter and an L waveband band-stop filter, which are integrated on a superconducting thin film substrate; an input end of the L waveband band-pass filter is connected with an input end of the P waveband band-pass filter, and the connection point therebetween serves as an input end of the superconducting filter structure; an output end of the L waveband band-pass filter is connected with an input of the L waveband band-stop filter, and pass bands of the L waveband band-pass filter and the L waveband band-stop filter are partially superposed; an output end of the P waveband band-pass filter is connected with an output end of the L waveband band-stop filter, and the connection point therebetween serves as an output end of the superconducting filter structure; each of the L waveband band-pass filter and the P waveband band-pass filter consists of an input feeder line, an output feeder line and a plurality of half-wavelength resonators; and the L waveband band-stop filter consists of a coupling microstrip line and a plurality of half-wavelength resonators. The superconducting filter structure can work at two frequency bands at the same time, and has a relatively high rectangle coefficient.

Description

technical field [0001] The invention relates to the technical field of superconducting filtering, in particular to a superconducting filtering structure. Background technique [0002] With the development of communication technology, diverse communication systems make spectrum resources more and more scarce. Many communication systems also require to work in multiple communication frequency bands at the same time, which puts forward higher requirements for filter performance. In order to reduce the interference between communication systems, the filter at the receiving end needs to have a higher square coefficient and lower insertion loss, but a high-performance filter usually requires a higher number of filter stages, and the more stages the filter The size of the filter will be larger, and the filter is also required to work in multiple frequency bands at the same time, which further increases the size of the filter and cannot meet the needs of existing communication syste...

AI Technical Summary

Problems solved by technology

In order to reduce the interference between communication systems, the filter at the receiving end needs to have a higher square coefficient and lower insertion loss, but a high-performance filter usually requires a higher number of filter stages, and the more stages the filter The size of the filter will be larger, and the filter is also required to work in multiple frequency bands at the same time, which further increases the size of the filter and cannot meet the needs of existing communication systems for miniaturized high-performance filters

Images