Design of Dual-Mode Dual-Band Superconducting Filters

Design of Dual-Mode Dual-Band Superconducting Filters
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双模双频超导滤波器的设计

DOI:
10.1109/tasc.2017.2732288
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发表时间:
2017-07
影响因子:
1.8
通讯作者:
Jiang Linan
Jiang Linan
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Ma Pengyu;Wei Bin;Hong Jiasheng;Cao Bisong;Guo Xubo;Jiang Linan

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本文提出了一种超导双模双频滤波器的综合设计方法。提出了一种基于无损集总元件双模谐振器电路的低通到双通带通频率变换。利用耦合矩阵理论和所提出的频率变换公式,导出了双模微带谐振器的耦合<inline-formula><tex-math notation="LaTeX">系数k</tex-math></inline-formula>和外品质<inline-formula><tex-math notation="LaTeX">因数Qe的</tex-math></inline-formula>计算公式。这使得双模双通带滤波器的设计过程类似于单通带滤波器的设计过程。为了演示,设计并制作了四个具有不同双模谐振器结构的双频超导滤波器,如阶梯阻抗,双负载和嵌入式谐振器。实测结果与仿真结果吻合较好。
This paper presents a synthesis design method for superconducting dual-mode dual-band filters. A low-pass to dual-band bandpass frequency transformation is proposed based on lossless lumped-element dual-mode resonator circuits. Formulas for extracting the coupling coefficient <inline-formula><tex-math notation="LaTeX">$k$</tex-math> </inline-formula> and external quality factor <inline-formula><tex-math notation="LaTeX">$Q_e$</tex-math> </inline-formula> of dual-mode microstrip resonators are derived using the coupling matrix theory and the proposed frequency transformation formula. This makes the design process of dual-mode dual-band filters similar to that of the single bandpass filter. For the demonstration, four dual-band superconducting filters with different dual-mode resonator structures, such as stepped-impedance, stub-loaded, and embedded resonators are designed and fabricated. The measured results match well with the simulations.
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