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Journal of Electrical and Computer Engineering
Volume 2014 (2014), Article ID 176560, 5 pages
Research Article

Design of Dual-Band Bandpass Filter Using Dual-Mode Defected Stub Loaded Resonator

1School of Information Engineering, East China Jiaotong University, Nanchang 330013, China
2School of Electrical and Electronic Engineering, East China Jiaotong University, Nanchang 330013, China

Received 1 May 2014; Revised 20 June 2014; Accepted 23 June 2014; Published 21 July 2014

Academic Editor: John N. Sahalos

Copyright © 2014 Dechang Huang and Zhaodi Huang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A novel approach for designing a dual-band bandpass filter (BPF) using defected stub loaded resonator (DSLR) is presented in this paper. The proposed DSLR consists of two fundamental resonant modes and some resonant characteristics have been investigated by EM software of Ansoft HFSS. Then, based on two coupled DSLRs, a dual-band response BPF that operates at 2.4 GHz and 3.5 GHz is designed and implemented for WLAN and WIMAX application. The first passband is constructed by two lower frequencies of the coupled DSLRs and the second passband is produced by two higher ones; the coupling scheme of them is also given. Finally, the dual-band BPF is fabricated and measured; a good agreement between simulation and measurement is obtained, which verifies the validity of the design methodology.