Coupling structure of high-temperature superconductive filter for adjusting-free satellite communication and making process

Abstract

A regulation-free coupling structure of a high-temperature super conduction filter used in satellite communication characterizes in inserting sections of L transmission lines in the same process technology with the resonator and tap and finished at one run in a suitable place between two resonators connected by wires at both sides of a bandpass filter and another resonator slantly opposite to them suitable for the design of frequency preselector of satellite receiving system RF front end or the base station front end in mobile communication system. Reflection loss in pass-band reduces to -20dB from original-15dB and transmission efficiency S21 is improved.

Description

technical field [0001] The coupling structure and manufacturing process of the high-temperature superconducting filter for non-tuning satellite communication belong to the technical field of analog signal processing and communication, and especially relate to the technical field of the radio frequency front end of the satellite communication receiving system or the frequency preselector of the base station front end in the mobile communication system. Background technique [0002] The traditional low-pass prototype filter synthesis method based on lumped parameter elements, when doing low-pass-band-pass frequency conversion, only at the center frequency f 0 It is accurate, but there are errors in other frequencies, especially in the stop band, there will be a large error. On the other hand, when the lumped parameter element is replaced by a microwave structure, errors will also be introduced. For example, a semi-open structure microstrip line is used to form a resonator. Sin...

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Problems solved by technology

This not only directly causes power loss, but also may lead to the instability of the pre-stage unit circuit in some demanding occasions.

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