Title :
Research on the Parasitic Passband Suppression of Microstrip Stepped Impedance Resonator Filters
Author :
Wu, Tao ; Tang, Xiao-Hong ; Xiao, Fei
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu
Abstract :
In this paper, the stepped impedance resonator filter is introduced whose parasitic passband, one of the key characteristics of stepped impedance resonator filter, is analyzed. Then, the methods to improve the parasitic passband suppression are proposed. The research shows that three different components: the lambda/4 open stub, the VIA and the resistance attached to the center of the stepped impedance resonator, can be used to suppress parasitic passband to some extent. After the comparison among these three methods, the conclusion is drawn that the stepped impedance resonator filter with a 10 Omega resistance loaded at the center of the resonator is the suitable choice for best frequency response.
Keywords :
band-pass filters; microstrip filters; resonator filters; VIA; microstrip; open stub; parasitic passband suppression; resistance; stepped impedance resonator filters; Band pass filters; Impedance; Low pass filters; Microstrip filters; Microstrip resonators; Microwave filters; Passband; Radio frequency; Resonance; Resonator filters;
Conference_Titel :
Art of Miniaturizing RF and Microwave Passive Components, 2008. IMWS 2008. IEEE MTT-S International Microwave Workshop Series on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-2876-2
Electronic_ISBN :
978-1-4244-2877-9
DOI :
10.1109/IMWS.2008.4782299