Design of Dual-Band Bandpass Filter with Quasi-Elliptic Function Response for WLANs

Min-Hang WENG
Hung-Wei WU
Kevin SHU
Ru-Yuan YANG
Yan-Kuin SU

IEICE TRANSACTIONS on Electronics   Vol.E90-C    No.1    pp.189-191
Publication Date: 2007/01/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.1.189
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
dual-band,  step-impedance resonators (SIRs),  transmission zeros,  

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Novel dual-band bandpass filter (BPF) with quasi-elliptic function response by using the meander coupled step-impedance resonators (SIRs) is presented. By tuning the appropriate impedance ratio (K) and physical length of SIRs, the BPF has good dual-band performance at 2.4 and 5.2 GHz with high selectivity, due to the transmission zeros appeared in two passband edges. Measured results of the proposed BPF have a good agreement with the electromagnetic (EM) simulated results.