National Changhua University of Education Institutional Repository : Item 987654321/10317

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NCUEIR > College of Engineering > eedept > Proceedings > Item 987654321/10317

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/10317

Title:	A Parallel Doubly Coupled Dual-Band Bandpass Filter
Authors:	Rao, Zhen-Mao;Wong, Tzu-Jung;Ho, Min-Hua
Contributors:	電子工程學系
Keywords:	Bandpass filters;Coupled transmission lines;Microstrip filters;Zero assignment
Date:	2006-06
Issue Date:	2012-05-22T06:28:18Z
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Abstract:	A parallel doubly coupled stepped impedance resonators (SIRs) structure is proposed in this paper to build a 2.4/5.2 GHz dual-band bandpass filter for a WLAN application. The prototype filter is a three-stage design composed by four SIRs in conjunction with the tapped-line used in the I/O ports to create zeros by the passband skirts. The proposed filter has the advantages of a much wider fractional bandwidth in both the passbands without sacrificing the passband's insertion losses. The conventional parallel-coupled microstrip line model is applicable in the proposed filter design. The filter has obtained almost twice wider bandwidth compared to that possessed by the counterpart filter of a conventional parallel-coupled line configuration. It is convinced that this filter design can be apply to the 2.4/5-GHz dual-band operation that needs a wider second passband. The experiment is conducted for filter performance validation. A very good agreement is observed between the simulation and the measurements.
Relation:	2006 IEEE MTT-S International Microwave Symposium Digest, San Francisco, CA, June 11-16, 2006: 511-514
Appears in Collections:	[eedept] Proceedings

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