| The surface resistance of HTS thin films is very low, so HTS thin films can be made into filters of excellent performance. And in recent years, HTS filter is applied to Receiver System continuously, so that the system performance of the receiver has been greatly improved.Based on this background, this thesis will apply HTS thin films, developing a high- performance multi-channel receiver front-end system. This paper mainly involves the following aspects:(1) Multi-channel filter design. This multi-channel filter consists of three band-pass filters of different frequency band connecting with four T-junctions. Compared with the single channel filter, multi-channel filter can improve the receiver anti-jamming capability.(2) Low-noise amplifier design. This section mainly describes the low-noise amplifier design process, and how to improve the stability of low-noise amplifier.(3) Test and analysis. This section mainly describes the test case of HTS multi-channel filter, the test case of low-noise amplifier, the test case of system, as well as the note matters in the test process. Meanwhile, these test results were analyzed and summarized.The experiments show that each index of this HTS multi-channel receiver front-end meets the design requirements, except that the center frequency of the second channel is 2MHz higher than the requirement. Each channel gain is greater than 12.8dB. Reflection coefficient of each channel is less than -11dB. System noise figure is less than 1.5 dB. Ps?1 is greater than 4dBm. Thus, high-temperature superconducting receiver has very obvious advantages and broad application prospects. |
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