Title :
Bandpass filter using microstrip ring resonators
Author :
Wu, Q.S. ; Xue, Q. ; Chan, C.H.
Author_Institution :
Dept. of Electr. Eng., City Univ. of Hong Kong, China
Abstract :
A new ring resonator with enhanced coupling is proposed. For a 5.2 GHz resonator, |S21| of the second resonant mode is 12 dB below that of the first mode. Based on this new structure, a bandpass filter is constructed. The insertion loss is 0.2 dB better and out-of-band suppression at 150 MHz offset is 7 dB better than those of the generic coupled-line filter and the size is 21% smaller.
Keywords :
band-pass filters; microstrip filters; microstrip resonators; microwave filters; passive filters; resonator filters; 0.2 dB; 5.2 GHz; bandpass filter; coupling enhancement; insertion loss; line-to-ring coupling structure; microstrip ring resonator; out-of-band suppression;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030035
