A 23 GHz high-temperature superconducting microstrip filter for radio astronomy

查看全文 作　　者：GAO Lu GUO Jin WANG YueHui YU Tao ZHANG Qiang LI ChunGuang ZHANG XueQiang LI Hong LI JunJie LI WuXia GU ChangZhi MENG JiBao FENG Ji HE [1]YuSheng

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

出　　处：《Chinese Science Bulletin》索引2009年第54卷第19期,共4页

基　　金：Supported by the Knowledge Innovative Program of Chinese Academy of Sciences (Grant No. KJCX2-YW-W16);National High-Tech Research and Develop- ment Program of China (Grant No. 2007AA03Z215) 摘　　要：This paper reports a 6-pole high-temperature superconducting (HTS) microstrip bandpass filter for radio astronomy applications. The filter has a center frequency of 23 GHz and a bandwidth the 2 GHz. We have made many efforts, such as adopting 0.25-mm-thick substrate, carefully designing the housing box and filter layout, to solve the problems in realizing a K-band planar filter. A special straight-line half-wavelength resonator (center-widen resonator) was also designed to reduce the insertion loss of the filter. The measured results showed a midband insertion loss of 0.11 dB with a ripple of 0.4 dB, and a return loss better than 11.5 dB. Good agreement was obtained between simulated and measured results. 关键词：微波传输带无线电通信电波天文学超导

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A 23 GHz high-temperature superconducting microstrip filter for radio astronomy

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