Design of Tri-Band Superconducting Bandpass Filters with Independently Controllable Bandwidths
Design of Tri-Band Superconducting Bandpass Filters with Independently Controllable Bandwidths
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DOI：
10.1109/isec.2015.7383448
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发表时间：
2015-07
期刊：
影响因子：
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通讯作者：
N. Sekiya;S. Sugiyama
中科院分区：
文献类型：
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作者：
N. Sekiya;S. Sugiyama
研制了一种高温超导三频带通滤波器。该带通滤波器由三极点双频带通滤波器(DBPF)和三极点单频带通滤波器(SBPF)组成，DBPF采用短节加载曲折线谐振器，附加电容加载微带线，SBPF采用具有公共输入和输出的折叠阶跃阻抗谐振器。DBPF构建第一和第三频带，SBPF形成第二频带。DBPF能够独立控制第一和第二频带的中心频率。利用附加的微带线可以灵活地调节DBPF的带宽。利用基于矩量法的电磁模拟器对其进行了设计和分析。用YBa2Cu3Oy薄膜在25×25×0.5 mm的Al_2O_3衬底上制备了热障涂层。三通频段的中心频率分别为3.5、4.25、5.0 GHz；三个频段的带宽为2%。实验测得的TBPF频率响应与仿真结果吻合良好。
A high-temperature superconducting tri-band bandpass filter (TBPF) has been developed. The TBPF is realized by combining a three-pole dual-band bandpass filter (DBPF) which uses stub-loaded meander line resonators with an additional capacitance-loaded microstrip line, and a three-pole single band bandpass filter (SBPF) which uses folded stepped-impedance resonator with common input and output. The DBPF constructs the first and third bands, and the SBPF forms the second band. The DBPF enables independent control of the center frequencies of the first and second bands. The bandwidths of the DBPF can be flexibly adjusted using the additional microstrip lines. The TBPF was designed and analyzed using an electromagnetic simulator based on moment method. The TBPF was fabricated using YBa2Cu3Oy thin film on a 25×25×0.5 mm Al2O3 substrate. The center frequencies of the three-pass-bands are 3.5, 4.25, 5.0 GHz; three bands have a 2% bandwidth. The measured frequency response of the TBPF was in good agreement with the simulated one.