Title :
Varactor-tuned dual-band filter with constant absolute bandwidth
Author :
Zhao, Yangping ; Liu, Taijun ; Xu, Tiefeng ; Nie, Qiuhua ; Xia, Yinshui ; Wang, Rangding ; Jiang, Gangyi ; Ye, Yan
Author_Institution :
Ningbo University, 315211, China
Abstract :
This paper proposed a novel varactor-tuned dual-band filter with constant absolute bandwidth. It is composed of a pair of half-wavelength open-ended resonators and a pair of quarter-wavelength short-ended resonators. The resonators utilized two different methods to control the electric and magnetic coupling so as to achieve constant absolute bandwidth. A dual-band tunable filter is designed, and the measured results of the filter illustrate the effectiveness of this design method.
Keywords :
Bandwidth; Couplings; Dual band; Magnetic separation; Microwave filters; Passband; Resonator filters; Dual-band filter; cognitive radio; electric and magnetic coupling; tunable filter; varactor;
Conference_Titel :
Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International
Conference_Location :
Montreal, QC, Canada
Print_ISBN :
978-1-4673-1085-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2012.6259670
