%0 Journal Article
%T A Simple Microstrip Bandstop Filter Using Cross-Coupling Stubs
%A Leung Chiu
%A Quan Xue
%J International Journal of Microwave Science and Technology
%D 2012
%I Hindawi Publishing Corporation
%R 10.1155/2012/473030
%X This paper presents an alterative implementation of a shunt open-circuited stub for multilayer microwave circuit. With making use of the proposed implementation, a simple and compact bandstop filter with a district bandstop characteristics and a first spurious at the third harmonic is proposed. The proposed filter exhibits about 12.5% fractional bandwidth of −10 dB signal rejection at the center frequency of 2.04 GHz and flat group delay at the pass bands. Besides, by cascading a number of the proposed bandstop filters designed at the different frequencies, multiband bandstop filters can be easily realized. A dual- (tri-) band design at the center frequencies of 2 GHz and 3 GHz (and 4 GHz) is designed, realized, and measured. The proposed bandstop filter well suits the nowadays multilayer and compact radio frequency integrated circuit design.
%U http://www.hindawi.com/journals/ijmst/2012/473030/