Title :
Design of a tunable bandpass filter with the assistance of modified parallel-coupled lines
Author :
Chien-Tai Tseng ; Ching-Wen Tang ; Shih-Chieh Chang ; Yuan-Chih Lin
Author_Institution :
Dept. of Commun. Eng., Nat. Chung Cheng Univ., Chiayi, Taiwan
Abstract :
A tunable bandpass filter with a wide tuning range is presented. The proposed filter is composed of two modified parallel-coupled lines and one varactor-loaded stub. The measured results show that a broad tuning range of 41.7%, from 0.95 to 1.45 GHz, was achieved. Within the tuning range, the insertion loss is from 2.4 to 2.9 dB and the return loss is greater than 15dB.
Keywords :
band-pass filters; circuit tuning; coupled circuits; network synthesis; varactors; frequency 0.95 GHz to 1.45 GHz; insertion loss; loss 2.4 dB to 2.9 dB; modified parallel coupled lines; return loss; tunable bandpass filter; varactor loaded stub; wide tuning range; Band-pass filters; Filtering theory; Loss measurement; Passband; Tuning; Varactors; Wireless communication; Bandpass filter; tunable filter; varactor;
Conference_Titel :
Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4673-6177-4
DOI :
10.1109/MWSYM.2013.6697454
