Title :
Compact microstrip lowpass filter using slow-wave resonator
Author :
Chen, Jian-Xin ; Xue, Quan
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
A compact microstrip lowpass filter using slow-wave resonator is proposed. The size of lowpass filter is reduced and the stopband between the first and second resonant frequencies is extended due to the loading capacitance. The filter has the characteristics of quasi-elliptic function, and then two transmission zeros in the stopband are realized to enhance the rejection of stopband. A demonstration filter is designed, fabricated and tested. Theoretical and experimental results are presented.
Keywords :
low-pass filters; microstrip filters; poles and zeros; resonators; slow wave structures; loading capacitance; microstrip lowpass filter; quasielliptic function; resonant frequencies; slow-wave resonator; transmission zeros; Capacitance; Circuit simulation; Equivalent circuits; Feeds; Impedance; Microstrip filters; Microstrip resonators; Microwave filters; Resonant frequency; Resonator filters;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1610079
