Title :
Dual-band coupling and feed structure for microstrip filter design
Author :
Lee, Hong-Ming ; Chen, Chung-Rung ; Tsai, Chin-Chuan ; Tsai, Chih-Ming
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
A new configuration of dual-band filter design is presented in this paper. Stepped-impedance transmission-line sections are used as the tunable dual-band resonators. New coupling structures and matching networks at input and output are also proposed to achieve a dual-band characteristics. Three filters with their second passband at 1.5, 2, and 2.5 times the fundamental frequency are designed as examples, and they are all verified by experimental results.
Keywords :
band-pass filters; coupled transmission lines; microstrip filters; microwave circuits; resonator filters; coupled transmission lines; coupling structure; distributed parameter filters; dual-band coupling; dual-band filter design; dual-band resonators; feed structure; filter design configuration; matching networks; microstrip filter design; microwave circuits; passband filters; stepped-impedance transmission-line section; tunable resonators; Band pass filters; Couplings; Dual band; Feeds; Microstrip filters; Microwave filters; Passband; Resonant frequency; Resonator filters; Tunable circuits and devices;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1338997
