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2014-02-18
Compact Tri-Band Bandpass Filter for WLAN and WiMAX Using Tri-Section Stepped-Impedance Resonators
By
Progress In Electromagnetics Research Letters, Vol. 45, 39-44, 2014
Abstract
In this paper, a compact tri-band microstrip bandpass filter (BPF) using tri-section stepped-impedance resonators (TSSIRs) with open stub line and zero-degree feed line is presented. Three tunable passbands are achieved by changing the ratio of impedance. By adding the open stub line, the frequency responses of tri-band at 2.4 GHz/3.5 GHz/5.2 GHz can be obtained precisely. With a proper length of the cone-shaped zero-degree feed structure, we can obtain transmission zeros in stopbands and better return loss in passbands. The proposed tri-band BPF has high selectivity and is simple in fabrication.
Citation
Bo Liu Yimin Zhao , "Compact Tri-Band Bandpass Filter for WLAN and WiMAX Using Tri-Section Stepped-Impedance Resonators," Progress In Electromagnetics Research Letters, Vol. 45, 39-44, 2014.
doi:10.2528/PIERL14011807
http://www.jpier.org/PIERL/pier.php?paper=14011807
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