Varactor-Tuned Narrow-Band High Temperature Superconducting Notch Filter

Autor:	Chunguang Li, Hong Li, Dandan Bai, Yongbo Bian, Liang Sun, Fengjin Xia, Jia Wang, Guoqiang Li, Yusheng He, Na Li, Xueqiang Zhang, Xu Wang, Yun Wu
Rok vydání:	2014
Předmět:	Materials science business.industry Ground Attenuation Bandwidth (signal processing) Biasing Condensed Matter Physics Band-stop filter Electronic Optical and Magnetic Materials Narrowband Optoelectronics Insertion loss Electrical and Electronic Engineering business Varicap
Zdroj:	IEEE Transactions on Applied Superconductivity. 24:1-4
ISSN:	1558-2515 1051-8223
DOI:	10.1109/tasc.2014.2340577
Popis:	A tunable narrow band high temperature superconducting (HTS) notch filter is presented. HTS folded square open loop resonator loaded with hyper-abrupt GaAs varactor is used to reach high tunability and avoid the via-hole grounding. Measured results show that the notch frequency can be tuned from 286 to 485 MHz (tuning range of 51.6%), and the attenuation from 26 to 70 dB when the bias voltage of the varactors is from 1 to 20 V. The -3 dB bandwidth is between 6.9 and 7.9 MHz, and the out-of-band insertion loss is less than 0.2 dB. Furthermore, the reliability of manufacture techniques of the filter is proved by mechanical vibration and shock tests.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5e41675dd3fc69f3510ae7fe6833fef2 https://doi.org/10.1109/tasc.2014.2340577 Zobrazit plný text záznamu