Title :
Filtering rat-race coupler with transmission zeros using compact miniaturized hairpin resonators
Author :
Tsu-Wei Lin ; Jen-Yi Wu ; Jen-Tsai Kuo
Author_Institution :
Inst. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
March 30 2015-April 1 2015
Abstract :
A new compact filtering rat-race coupler is implemented by a 2×2 cross coupled configuration based on compact miniaturized hairpin resonators. Passband responses with transmission zeros are synthesized by an (n+4)×(n+4) coupling matrix. The zeros are created in the output ports by adding source-load coupling and their analytical expressions are derived. An experimental circuit is fabricated and measured. The circuit area is only 23.2% of that of a conventional rat-race coupler. Measured magnitude and phase responses of the four-port S-parameters show good agreement with simulation data.
Keywords :
band-pass filters; filtering theory; matrix algebra; resonators; bandpass filter; compact filtering rat-race coupler; compact miniaturized hairpin resonators; four-port S-parameters; passband responses; source-load coupling; transmission zeros; Couplers; Couplings; Filtering theory; Frequency measurement; Passband; Ports (Computers); Bandpass filter; coupling matrix; rat-race coupler; source-load coupling; transmission zero;
Conference_Titel :
Wireless Symposium (IWS), 2015 IEEE International
Conference_Location :
Shenzhen
DOI :
10.1109/IEEE-IWS.2015.7164553
