Title :
High-selectivity dual-passband bandpass filter with dual coupled lines
Author :
Bo-Han Wang ; Ching-Wen Tang
Author_Institution :
Dept. of Commun. Eng., Nat. Chung Cheng Univ., Chiayi, Taiwan
Abstract :
A microstrip dual-band bandpass filter is presented. By adjusting the even- and odd-mode impedances, two resonances formed two passbands. Moreover, transmission zeros are located at both sides of two passband skirts, which can be adjusted by the coupling coefficient of the shorted coupled line. For demonstration, a dual-band bandpass filter operating at 0.8 and 2.2 GHz is designed and fabricated. The theoretical analysis and measurement are presented. Good agreement verifies the proposed method.
Keywords :
UHF filters; band-pass filters; electric impedance; microstrip filters; microstrip lines; coupling coefficient; dual coupled lines; even-mode impedances; frequency 0.8 GHz; frequency 2.2 GHz; microstrip dual-band bandpass filter; odd-mode impedances; passband skirts; shorted coupled line; transmission zeros; Abstracts; Filtering theory; Passband; Resonant frequency; Substrates; Bandpass filter; deal passband; dual coupled lines;
Conference_Titel :
Microwave Symposium (IMS), 2014 IEEE MTT-S International
Conference_Location :
Tampa, FL
DOI :
10.1109/MWSYM.2014.6848462
