X-band high-temperature superconducting triplexer with multi-branch coupling structure and preparation method thereof

Abstract

The invention discloses an X-waveband high-temperature superconducting triplexer with multi-branch coupling structure and a manufacturing method thereof.The triplexer having small insertion loss with an X-waveband and three filtering channels can be manufactured by using the manufacturing method, is simple and compact in structure and is easily integrated at the front microwave receiving end of a communication system to achieve high-sensitivity communication.The low-loss filtering channels are formed by selecting high-quality-factor resonators, and an impedance matching method is adopted to achieve the design and performance optimization of a duplexer.A layer-by-layer method is adopted to regard the duplexer as a whole, the duplexer is rapidly integrated with another channel in a parallel connection mode, and a good design objective is achieved.A high-temperature superconducting material is adopted to manufacture a triplexer circuit, circuit loss is reduced by adopting a gold plated packaging box, the channels are isolated by adopting metal shielding plates, meanwhile the problems of inter-channel coupling and a packaging box microwave resonance inhibiting mode are solved, and further the high-temperature superconducting narrow-band triplexer having good in-band properties is achieved.

Description

technical field [0001] The invention relates to the technical field of microwave communication equipment, in particular to an X-band high-temperature superconducting triplexer with a multi-branch coupling structure and a preparation method. Background technique [0002] In the microwave communication system, communication systems such as communication satellites, marine radars, and fire control radars work in the X-band, and the X-band filter is often integrated in the front end of the communication receiver to play the role of frequency selection. The multiplexer has multiple frequency bands for communication selection to solve the problem that the frequency band of a single filter is interfered and affects communication. [0003] A resonator is the basic unit of a filter or a multiplexer. In the design process of a resonator, the first factor to consider is whether the resonator has a high unloaded Q value to achieve a lower filter insertion loss. The insertion loss value...

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Problems solved by technology

[0007] However, the conductor loss increases rapidly with microwave frequency, and the Q of the resonator u will decrease significantly with the increase of operating frequency

Since the frequency range of the X-band microstrip filter is 8 to 12 GHz, the conductor loss in this frequency range will increase rapidly, resulting in Q u Significantly improved, thereby increasing the filter insertion loss value (L A ) 0

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