Title :
A new varactor-tuned microstrip ring bandpass filter with harmonic suppression
Author :
Park, H.J. ; Park, J.Y. ; Lee, J.C. ; Kim, J.H. ; Lee, B. ; Kim, N.Y. ; Hong, U.S.
Author_Institution :
RFIC Res. & Educ. Center, Kwangwoon Univ., Seoul, South Korea
Abstract :
A new bandpass filter that is composed of two stage microstrip ring resonators with the center frequency of 5.775 GHz and the bandwidth of 100 MHz has been presented in this paper. For the suppression of unnecessary harmonics, lowpass filters are integrated into a microstrip ring resonator. Harmonic suppression ratios of about 35 dB are obtained. Also, a varactor-tuned microstrip ring bandpass filter with harmonic suppression is studied. Insertion loss of 6 dB and tuning bandwidth of 450 MHz are obtained for this circuit
Keywords :
band-pass filters; circuit tuning; harmonics suppression; microstrip filters; microstrip resonators; resonator filters; varactors; 100 MHz; 450 MHz; 5.775 GHz; 6 dB; bandpass filter; harmonic suppression; insertion loss; lowpass filter; microstrip ring resonator; varactor tuning; Band pass filters; Bandwidth; Frequency; Harmonics suppression; Insertion loss; Microstrip filters; Microstrip resonators; Optical ring resonators; Power harmonic filters; Resonator filters;
Conference_Titel :
Microwave Conference, 2000 Asia-Pacific
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6435-X
DOI :
10.1109/APMC.2000.926028
