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NCUEIR > College of Engineering > eedept > Periodical Articles > Item 987654321/10708

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/10708

Title:	Dual-band balanced BPF using λ/4 stepped-impedance resonators and folded feed lines
Authors:	Lee, Ching-Her;Wang, I-Chin;Hsu, Chung-I G.
Contributors:	電子工程學系
Date:	2009-12
Issue Date:	2012-05-29T01:22:52Z
Publisher:	VSP BV
Abstract:	This paper presents a second-order dual-band balanced bandpass filter (BPF) designed using bi-section quarter-wavelength (λ/4) stepped-impedance resonators (SIRs) and folded feed lines. The first two modes of the λ/4 SIRs are designed to resonate in the designated 2.4- and 5.2-GHz WLAN bands. High-impedance folded transmission-line sections are inserted in series with the feed lines to improve the overall impedance matching at the input/output ports, so that the signal transmission can be enhanced. In addition, the feed lines and λ/4 SIRs are properly arranged to form an all-stop-like coupling configuration for common-mode operation. For the first (second) operating band of interest, the fabricated balanced BPF printed on an FR4 substrate was measured to have a minimum differential-mode insertion loss of 3.03 dB (4.3 dB) and a minimum common-mode rejection level of as high as 15.7 dB (22.3 dB).
Relation:	Journal of Electromagnetic Waves and Applications, 23(17/18): 2441-2449
Appears in Collections:	[eedept] Periodical Articles

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