National Changhua University of Education Institutional Repository : Item 987654321/10708
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题名: Dual-band balanced BPF using λ/4 stepped-impedance resonators and folded feed lines
作者: Lee, Ching-Her;Wang, I-Chin;Hsu, Chung-I G.
贡献者: 電子工程學系
日期: 2009-12
上传时间: 2012-05-29T01:22:52Z
出版者: VSP BV
摘要: 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).
關聯: Journal of Electromagnetic Waves and Applications, 23(17/18): 2441-2449
显示于类别:[電子工程學系] 期刊論文

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