DocumentCode :
3134386
Title :
New dual-mode dual-band bandpass filter with quasi-elliptic function passbands and controllable bandwidths
Author :
Lin, Tao ; Lok, U. ; kuo, jay
Author_Institution :
National Chiao Tung University, Hsinchu, Taiwan
fYear :
2010
fDate :
23-28 May 2010
Firstpage :
1
Lastpage :
1
Abstract :
New dual-mode dual-band bandpass filters with quasi-elliptic function responses are devised based on a single stepped-impedance resonator. The center of the resonator is grounded through a short high-impedance section which is equivalent to an inductor for providing coupling between the resonant modes. In addition, in order to increase the degree of freedom for the dual-band design, an interdigital capacitor is introduced so that both center frequencies and bandwidths of the two passbands can be controlled. Moreover, with the aid of source-load coupling, two extra transmission zeros can be created close to the passband edges and hence greatly improve the filter selectivity between the two passbands. Two filters are fabricated and measured to validate the proposed idea. The measured results show good agreement with the simulation.
Keywords :
Band pass filters; Bandwidth; Capacitors; Couplings; Dual band; Filtering theory; Frequency; Inductors; Passband; Resonance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location :
Anaheim, CA
ISSN :
0149-645X
Print_ISBN :
978-1-4244-6056-4
Electronic_ISBN :
0149-645X
Type :
conf
DOI :
10.1109/MWSYM.2010.5517135
Filename :
5517135
Link To Document :
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