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中国物理学会期刊

高温超导膜微波表面电阻Rs对微波滤波器插入损耗的贡献

CSTR: 32037.14.aps.54.359

Contributions of the surface resistance of high-temperature superconducting films to the insertion loss of the microwave filters

CSTR: 32037.14.aps.54.359
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  • 利用微波电路仿真软件,分析高温超导膜微波表面电阻Rs对各种频率、各种级数的滤波器插入损耗的影响.结果给出:对于级数较少、频率较低的滤波器,使用Rs较高的薄膜或厚膜就可以得到很低的插入损耗;对于频率较高(高于6GHz),或极数较多(超过8极)的滤波器,就必须采用高质量的高温超导薄膜(Rs<1mΩ).

     

    In this paper it is shown that the influence of the surface resistance of the high_temperature superconductors (HTS) on the insertion losses of the microwave filters with various poles and central frequencies was analyzed using simulat ion software for the electrical circuits. It is shown that HTS thick films or HT S thin films with relatively high surface resistance can be used to construct lo w insertion loss microwave filter with a few poles or with low central frequency . But high_quality epitaxial thin films must be used to construct low loss microwave filter with many poles (more than 8-poles) or with high central frequency (higher than 6GHz).

     

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