Three-pass-band high-temperature superconducting balanced filter based on double-ring loading

Abstract

The invention belongs to the technical field of microwave communication equipment, and in particular relates to a double-loop loaded tee-band high-temperature superconducting balanced filter, which includes two double-loop loaded stepped impedance resonators, an interdigital structure, an additional high-impedance microstrip line, Transmission line, input feeder and output feeder; the two double-loop loaded ladder impedance resonators are directly coupled through an interdigital structure, and an additional high-impedance micro The strip line is loaded on the central symmetry plane of the three-way high-temperature superconducting balanced filter, and the input feeder, the output feeder and the two double-loop loaded stepped impedance resonators are combined by slot coupling and lap coupling. feed. The invention has miniaturized circuit size and compact structure, and the center frequency and bandwidth of the three passbands are flexible and controllable.

Description

technical field [0001] The invention belongs to the technical field of microwave communication equipment, and in particular relates to a three-pass high-temperature superconducting balanced filter based on double-ring loading. Background technique [0002] With the rapid development of wireless communication services, the electromagnetic environment is becoming more and more complex, signal interference is becoming more and more serious, and spectrum resources will become increasingly scarce in the future. To reasonably and effectively solve these problems currently faced in the communication system, it is necessary to greatly improve the performance of the receiver in the communication base station and obtain more communication resources by increasing the available frequency band. Due to the development requirements of multi-network, multi-band, multi-service and anti-interference in modern wireless communication systems, research on miniaturized multi-passband balanced fil...

AI Technical Summary

Problems solved by technology

At present, there have been literatures using a single square ring loaded resonator to realize a dual-band-band balanced filter based on high-temperature superconducting materials, such as "B.Ren et al.,"Differential Dual-BandSuperconducting Bandpass Filter Using Multimode Square Ring Loaded ResonatorsWith Controllable Bandwidths, "IEEE Transactions on Microwave Theory and Techniques, vol.67, no.2, pp.726-737, Feb.2019." However, there is no public report on the design and production of three-pass high-temperature superconducting balanced filters

Images