Title :
Design of Compact Dual-Band Bandpass Filter Using λ/4 Resonators
Author :
Chu, Qing-Xin ; Ye, Liang-Hua ; Chen, Fu-Chang
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou
Abstract :
In this paper, a simple and effective method using two sets of lambda/4 resonators for designing dual-band filter has been investigated, and a practical filter has been fabricated, which provides two passbands at 2.4 and 5.2 GHz for WLAN application. The dual-passband characteristics are generated by adjusting the physical dimension of the top and bottom lambda/4 resonators. The bandwidth of each passband could be controlled independently by tuning the coupling gap. The measured insertion losses are 1.1 dB and 1.8 dB and the return losses are 24 dB and 20 dB at 2.4 and 5.2 GHz, respectively.
Keywords :
UHF filters; band-pass filters; microwave filters; wireless LAN; WLAN application; compact dual-band bandpass filter; coupling gap; frequency 2.4 GHz; frequency 5.2 GHz; insertion losses; passband filter; resonators; tuning; Band pass filters; Bandwidth; Costs; Dual band; Frequency; Impedance; Insertion loss; Passband; Resonator filters; Wireless LAN;
Conference_Titel :
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location :
Macau
Print_ISBN :
978-1-4244-2641-6
Electronic_ISBN :
978-1-4244-2642-3
DOI :
10.1109/APMC.2008.4958234
