High-temperature superconductivity resonator and balance filter formed by same

Abstract

The invention discloses a high-temperature superconductivity resonator and a balance filter formed by the same. The resonator comprises a substrate, a high-temperature superconductivity film formed on the substrate, and a circuit pattern formed by the high-temperature superconductivity film. The resonator is characterized in that the circuit pattern forms a microstrip line resonator, the microstrip line resonator is composed of a straight line section located in the middle and bent sections located at the two ends of the straight line section, and bent section circuits located at the two ends of the straight line section are distributed symmetrically about the perpendicular bisector in the length direction in a plane of the straight line section. Multiple curves are loaded at the tail end of the resonator, small design of a balanced type superconductivity filter is achieved, and the size of the resonator and the size of the filter constructed by the resonator are effectively reduced; meanwhile, the problems that when a traditional balance filter difference module carries out transmitting, the insertion loss is large, and common-mode rejection is not enough are solved; the filter has the advantages of being small, easy to integrate, small in difference module insertion loss and large in common mode rejection.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter wave passive devices, and in particular relates to a high-temperature superconducting resonator and a balanced filter composed of the same. Background technique [0002] RF microwave filters are important components of communication systems, radar systems, and measurement systems, and their performance is related to the performance of the system. Therefore, RF microwave filters have always been the focus and hotspot of research in the field of wireless communication. With the development of modern wireless communication technology, the system has higher and higher requirements for electromagnetic compatibility and anti-interference. In order to suppress common-mode noise and transmit differential-mode signals, traditional RF microwave front-end circuits often use a dual-port filter plus a balun structure. The structure forms a differential circuit, but it is bulky and difficult t...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of large insertion loss and insufficient common-mode rejection of e

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