Title :
Microstrip ring bandpass filters with new interdigital side-coupling structure
Author :
Jung, Woo-Chul ; Park, Hyun-Joo ; Lee, Jong-Chul
Author_Institution :
Won-Ik Telcom Co. Ltd., Kyungbuk, South Korea
Abstract :
In this paper, dual-mode microstrip ring bandpass filters with new interdigital side-coupling structure are presented. The interdigital side-coupling scheme has much lower insertion and return losses than any other side-coupling structure. Dual-mode microstrip ring bandpass filters with one or two local resonant split (LRS) circuits centered at 2.2 and 2.05 GHz show 3-dB bandwidths of only 70 and 75 MHz, the insertion losses of -2.75 and -2.12 dB, and return losses of -19.48 and -19.65 dB, respectively
Keywords :
UHF filters; band-pass filters; microstrip filters; microwave filters; passive filters; -2.12 to 19.65 dB; 2.05 GHz; 2.2 GHz; dual-mode bandpass filters; insertion loss; interdigital side-coupling structure; local resonant split circuits; microstrip ring bandpass filters; return loss; Band pass filters; Capacitors; Insertion loss; Microstrip filters; Microstrip resonators; Optical ring resonators; Q factor; RLC circuits; Resonance; Resonator filters;
Conference_Titel :
Microwave Conference, 1999 Asia Pacific
Print_ISBN :
0-7803-5761-2
DOI :
10.1109/APMC.1999.833682
