Premium
A high performance narrowband superconducting filter at Ku‐band
Author(s) -
Li Qirong,
Guo Xubo,
Cao Bisong,
Zhang Xiaoping,
Wei Bin,
Feng Cheng,
Ying Zhijun,
Zhang Guoyong,
Jin Shichao
Publication year - 2012
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26816
Subject(s) - return loss , narrowband , resonator , insertion loss , bandwidth (computing) , microwave , filter (signal processing) , materials science , fabrication , optoelectronics , electronic engineering , broadband , band pass filter , ku band , physics , electrical engineering , engineering , optics , telecommunications , medicine , alternative medicine , pathology , antenna (radio)
This letter presents the design, fabrication, and measurements of a high‐temperature superconducting (HTS) filter at 16 GHz with a 100‐MHz bandwidth. The main aspects of achieving high performance narrowband filter at such high frequency are analyzed and addressed. Simple rectangular resonators and end‐coupled structure are used in the design to achieve high quality factor (Q), weak coupling, and good parasitic response. The measurements of the seven‐pole HTS filter, without any tuning, exhibit a high performance. The insertion loss is less than 1.1 dB, equivalent of a resonator Q about 6100. The return loss is better than −15 dB, and the out‐of‐band rejection is over 70 dB up to 29.3 GHz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1514–1516, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26816