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NCUEIR > College of Engineering > eedept > Periodical Articles > Item 987654321/10693

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/10693

Title:	Cross- coupled YBCO BPFs with wide upper stopband using quarter-wavelength stepped-impedance resonators
Authors:	Hsu, Chung-I G.;Wang, Li-Ming;Chen, Li-Shian;Lee, Ching-Her
Contributors:	電子工程學系
Date:	2007-04
Issue Date:	2012-05-29T01:21:44Z
Publisher:	Physical Society of the Republic of China
Abstract:	This paper presents a cross-coupled high-temperature superconducting (HTS) bandpass filter (BPF) design using quarter-wavelength stepped-impedance resonators (λ/4 SIRs) for the wireless communication applications. A pair of transmission zeros associated with the cross-coupled configuration is designed to be placed near the passband skirts, greatly sharpening the rolling-off at the passband edges. The spurious-passband center frequency of the BPF using λ/4 SIRs is simulated to be higher than that of the BPF adopting λ/2 SIRs. A BPF using λ/4 SIRs, conceived to be smaller than the corresponding BPF using λ/2 SIRs, has been fabricated by double-sided depositing patterned YBCO film on a 10-mm-square and 0.5-mm-thick LaAlO3 substrate and by putting them in a copper housing. The measured results revealed that this BPF has a very wide stopband bandwidth beyond the desired passband.
Relation:	Chinese Journal of Phys., 45(2-II): 273-280
Appears in Collections:	[eedept] Periodical Articles

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