Title :
Periodic Stepped-Impedance Resonator (PSIR) Bandpass Filters with Multispurious Suppression
Author :
Chiou, Yi-Chyun ; Wu, Meng-Huan ; Kuo, Jen-Tsai
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu
Abstract :
Periodic stepped-impedance resonators (PSIRs) are proposed to design bandpass filters for multi-spurious suppression. Denoted as PSIRN, a PSIR of lambda/2 long at design frequency fo consists of N periods of hi-Z and low-Z sections. A PSIRN coupled section shows transmission zeros at various frequencies. The zeros can be tuned by changing the impedance ratio of the hi-Z and low-Z sections, and can be adopted to suppress the spurious peaks. Responses of the PSIR filters show good rejection in the upper stopband
Keywords :
band-pass filters; microstrip filters; periodic structures; poles and zeros; resonator filters; bandpass filters; microstrip filter; multispurious suppression; periodic stepped-impedance resonators; transmission zeros; Band pass filters; Coupling circuits; Dielectric substrates; Filtering theory; Frequency; Impedance; Microstrip filters; Microwave filters; Power harmonic filters; Resonator filters; Microstrip filter; multi-spurious suppression; stepped-impedance resonator (SIR); transmission zeros; upper stopband;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249524
