National Changhua University of Education Institutional Repository : Item 987654321/10276

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NCUEIR > College of Engineering > eedept > Periodical Articles > Item 987654321/10276

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/10276

Title:	The Dual-Band Bandpass Filters Using Doubly Parallel-Coupled SIRs with Multiple Zeros for WLAN Applications
Authors:	Ho, Min-Hua;Ho, Hao-Hung;Rao, Chen-Mao
Contributors:	電子工程學系
Keywords:	Doubly parallel-coupling;Multiple zeros assignment;Dual-band BPF;WLAN
Date:	2008-06
Issue Date:	2012-05-22T06:26:17Z
Publisher:	Maruzen Co., Ltd/Maruzen Kabushikikaisha
Abstract:	Two dual-band bandpass filters (BPFs) based on the doubly parallel-coupled stepped impedance resonators (SIRs) structures have been proposed in this paper. The coupled-SIRs with/without open-stub-loads are introduced in the filter design. The dual-band filters exhibiting multiple zeros design operate at 2.45/5.2-GHz for the WLAN applications. Two three-staged filters composed of four SIRs have been proposed with the tapped-line adapted in the I/O sections. A five-staged filter is constructed based on the same design principle to achieve a better band-rejection. The proposed filters have the advantages of a much wider bandwidth in both the passbands without sacrificing the passband's insertion loss and passband flatness. The design procedure for a conventional parallel-coupled microstrip lines model is still suitable to design the proposed filters. The proposed filters have achieved almost twice the band-width of a conventional parallel-coupled lines configuration under the same design parameters. The experiments have been conducted to verify filter performance. Measured results are in good agreement with the full-wave simulation results.
Relation:	IEICE Trans. on Electronics, E91-C(6): 949-955
Appears in Collections:	[eedept] Periodical Articles

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