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Chin. Phys. B, 2018, Vol. 27(6): 068503    DOI: 10.1088/1674-1056/27/6/068503

Compact high-order quint-band superconducting band-pass filter

Di Wu(吴荻)1, Bin Wei(魏斌)1, Xi-Long Lu(陆喜龙)2, Xin-Xiang Lu(卢新祥)3, Xu-Bo Guo(郭旭波)1, Bi-Song Cao(曹必松)1
1 State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;
2 The No. 14 Research Institute, China Electronic Technology Corporation(CETC), Nanjing 210013, China;
3 Department of Physics and Electronic Engineering, Shaoxing University, Shaoxing 312000, China
Abstract  In this paper, we present a compact quint-band superconducting filter operating at 2.4, 3.5, 4.7, 5.3, and 5.9 GHz. Matching junctions with different impedance branch lines are used to connect a dual-band sub-filter with a tri-band sub-filter and to reduce the channel interactions. The quint-band filter design is divided into two sections to determine the controllable frequencies and bandwidths, while ensuring compact size and reducing design complexity. The filter is fabricated on double-sided YBCO film deposited on an MgO substrate with a size of 26 mm×19 mm. The measured results match well with the simulations.
Keywords:  high-temperature superconducting      bandpass filter      multi-band      quint-band filter  
Received:  02 November 2017      Revised:  03 March 2018      Accepted manuscript online: 
PACS:  85.25.-j (Superconducting devices)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.61371009 and 61401282) and the National Key Scientific Instrument and Equipment Development Project of China (Grant No.2014YQ030975).
Corresponding Authors:  Bin Wei     E-mail:

Cite this article: 

Di Wu(吴荻), Bin Wei(魏斌), Xi-Long Lu(陆喜龙), Xin-Xiang Lu(卢新祥), Xu-Bo Guo(郭旭波), Bi-Song Cao(曹必松) Compact high-order quint-band superconducting band-pass filter 2018 Chin. Phys. B 27 068503

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