Title :
Compact dual-band BPF for GPS and WLAN with two dual-mode stepped impedance resonators
Author :
Zhang, Xue-shun ; Deng, Hong-wei ; Zhang, Lu ; Zhao, Yong-jiu ; Qiang, Li
Author_Institution :
Coll. of Inf. Sci. & Technol., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
A compact dual-band microstrip bandpass filter (BPF) is proposed using two dual-mode stepped impedance resonators (SIRs). Either of the dual-mode SIRs can not only separately generate one passband but also control the passband performance. Due to the intrinsic characteristics of the SIRs and source-load coupling, three transmission zeros are created near the passband edges to improve the selectivity of the filter. A dual-band filter located at 1.57 GHz (GPS application) and 2.40 GHz (WLAN application) is simulated and fabricated. Good agreements are obtained between its measured and simulated S-parameters.
Keywords :
Global Positioning System; S-parameters; UHF filters; band-pass filters; microstrip filters; resonator filters; wireless LAN; GPS; SIR; WLAN; compact dual-band BPF; compact dual-band microstrip bandpass filter; dual-mode stepped impedance resonators; filter selectivity; frequency 1.57 GHz; frequency 2.40 GHz; simulated S-parameters; source-load coupling; transmission zeros; Band pass filters; Dual band; Filtering theory; Microwave filters; Passband; Resonant frequency; Resonator filters; BPF; GPS; SIR; WLAN; dual-band;
Conference_Titel :
Mobile Congress (GMC), 2010 Global
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-9001-1
DOI :
10.1109/GMC.2010.5634581
