Parallel-coupled linear-phase superconducting filter
Parallel-coupled linear-phase superconducting filter
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DOI：
10.1007/s11434-014-0221-x
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发表时间：
2014-03
影响因子：
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通讯作者：
Tianliang Zhang;Kai-Fu Yang;Yifei Zhang;Hui-Qun Jin;Zhengxiang Luo
中科院分区：
文献类型：
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作者：
Tianliang Zhang;Kai-Fu Yang;Yifei Zhang;Hui-Qun Jin;Zhengxiang Luo
首次提出了一种新型的双耦合平面结构（一条微带线与两个谐振器重合耦合）。在此基础上，设计了一种同时具有线性相位响应和准椭圆函数响应的六极点并联耦合高温超导带通滤波器。该滤波器的通带为40 MHz，中心频率为2，000 MHz。其尺寸为18.67 mm × 25.96 mm。在77 K时，通带内最小插入损耗为0.26 dB.在70%的滤波器带宽上，群延迟变化<3 ns.
A novel double coupling planar structure (a single microstrip line coupled with two resonators coincidental) is presented for the first time. Based on this structure, a six-pole parallel-coupled high-temperature superconducting band-pass filter with both linear phase response and quasi-elliptic function response is designed. The filter has a 40 MHz passband with a center frequency of 2,000 MHz. Its dimension is 18.67 mm × 25.96 mm. At 77 K, minimum insertion loss is 0.26 dB in passband. The group delay variation is <3 ns over 70 % of the filter bandwidth.