Four-model resonator-based compact dual-passband high-temperature superconductive filter

Abstract

A four-model resonator-based compact dual-passband high-temperature superconductive filter is characterized by comprising an outer ring half wavelength hairclip resonator, an open circuit T type spiral branch, a first open circuit spiral branch, a second open circuit spiral branch, an input end and an output end; the open circuit T type spiral branch is arranged in the outer ring half wavelength hairclip resonator symmetrical about the open circuit T type spiral branch; the first and second open circuit spiral branches are arranged in the outer ring half wavelength hairclip resonator, and are symmetrical about the open circuit T type spiral branch; and the distance between the first open circuit spiral branch and the open circuit T type spiral branch is the same as that between the second open circuit spiral branch and the open circuit T type spiral branch; and the input end and the output end are in gap coupling with the outer ring half wavelength hairclip resonator. The four-model resonator-based compact dual-passband high-temperature superconductive filter can meet the communication system filtering demands on signals in non-adjacent wavebands, is small in size, simple and compact in structure, flexible in design and has an ultrahigh Q value.

Description

technical field [0001] The invention belongs to the technical field of microwave communication equipment and relates to a microwave high-temperature superconducting filter. Background technique [0002] In recent years, with the development of wireless communication technology, more and more wireless devices have been widely used. Due to the existence of various communication standards, frequency resources have become increasingly tight, so that the frequency band used by each communication standard is often used Divide into non-contiguous parts. Therefore, in an actual communication system, the system needs to receive signals of two different frequencies that are not adjacent. In this way, wireless devices that work in multiple frequency bands need RF front-end devices that work in multiple frequency bands, which undoubtedly increases the size of the device. As the development of informatization, everyone hopes that wireless RF products will be more portable and compact, s...

AI Technical Summary

Problems solved by technology

For example: design two filters with different passband frequencies, and connect them with T-shaped joints at both ends to realize the dual-passband filter characteristics of one in and one out, but the filters designed in this way are actually two Two T-shaped connectors are added to the filter at the same time, the structure is complex, matching and debugging are difficult, and the volume is large, which is not conducive to the miniaturization and integration of the system

There is also a technical solution, which is to form a dual-pass band filter by cascading a band-pass filter and a band-stop filter, which has the disadvantage of large volume and complex structure.

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