Title :
Bandwidth and losses of 4-port ferrite coupled line circulators
Author :
Cham Kiong Queck ; Davis, L.E.
Author_Institution :
Dept. of Electr. Eng. & Electron., Univ. of Manchester Inst. of Sci. & Technol., UK
Abstract :
For the first time, the bandwidth and the losses of a 4-port Ferrite Coupled Line (FCL) circulator are analysed and reported. A broadband hybrid coupler with an improved air-bridge has been designed for the circulator and the performance of a 4-port microstrip FCL circulator is predicted by cascading the S-matrices of the FCL and hybrid coupler using signal flow graphs. The possibility of realising a broadband circulator is investigated and it is found that there is a trade-off in performance between bandwidth and loss.
Keywords :
S-matrix theory; ferrite circulators; microstrip components; signal flow graphs; waveguide couplers; S-matrix; air bridge; bandwidth; broadband hybrid coupler; four-port microstrip ferrite coupled line circulator; loss; signal flow graph; Bandwidth; Circulators; Ferrites; Flow graphs; Magnetic analysis; Magnetic separation; Magnetization; Microstrip components; Microwave technology; Signal design;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1012134
