Title :
Compact lowpass filter using spiral compact microstrip resonant cells
Author :
Gu, J. ; Sun, X.
Author_Institution :
Shanghai Inst. of Microsyst. & Inf. Technol., Chinese Acad. of Sci., Shanghai, China
fDate :
9/15/2005 12:00:00 AM
Abstract :
A novel lowpass filter using spiral compact microstrip resonant cells (SCMRCs) for size reduction is presented. Four SCMRC resonators as open stub lines are connected at both sides of an SCMRC resonator so that the port impedance at the lowpass band is matched to 50 Ω. The proposed lowpass filter has compact circuit size and wide stop-band. A demonstration lowpass filter is designed, fabricated and measured. It shows low insertion loss, flat response in the lowpass band and wide stop-band.
Keywords :
impedance matching; low-pass filters; microstrip filters; microstrip resonators; 50 ohm; SCMRC resonator; insertion loss; lowpass filter; open stub lines; port impedance; spiral compact microstrip resonant cells;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20052569
