Title :
Novel microstrip stepped-impedance resonator for compact wideband bandpass filters
Author :
Liang, Cheng-Hsien ; Chang, Chi-Yang
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A novel ¿/4 microstrip stepped-impedance resonator with interdigital coupling elements is presented in this paper. By combining the merits of these two structures, strong coupling between adjacent resonators for wideband bandpass filters can be easily obtained and the size of the filter can be largely reduced. More importantly, only a single-sided fabrication process is required in the implementation of the proposed filter. Two four-pole bandpass filters with 0.1 dB equal-ripple bandwidths of 38% and 55%, respectively, are designed and fabricated. Both filters have the advantages of compactness, wide bandwidth, and ease of fabrication.
Keywords :
UHF filters; band-pass filters; microstrip filters; microstrip resonators; microwave filters; resonator filters; compact wideband bandpass filters; equal-ripple bandwidths; four-pole bandpass filters; interdigital coupling elements; microstrip stepped-impedance resonator; single-sided fabrication; Band pass filters; Bandwidth; Costs; Coupling circuits; Fabrication; Impedance; Microstrip filters; Microstrip resonators; Resonator filters; Wideband; Bandpass filter (BPF); interdigital; microstrip line; spurious response; stepped-impedance resonator (SIR);
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5384325
