Title :
On the Left Handed Ferrite Circulator
Author :
Okubo, Kensuke ; Tsutsumi, Makoto
Author_Institution :
Okayama Prefectural Univ.
Abstract :
Left handed (LH) ferrite circulators composed of the nonreciprocal LH microstrip lines using perpendicularly magnetized ferrite substrate and operating at the negative permeability frequency are studied. Following three types of circulators are proposed: a disk shaped circulator having broadband characteristics and high insertion loss, a triangular shaped circulator having small insertion loss and narrowband characteristics, and a ferrite-coupled-line LH circulator having wideband characteristics and high isolation. Although each structure has a advantage of circulator operation, the ferrite-coupled-line LH circulator has a potential for new signal processing functions of signal flow of backward characteristics
Keywords :
ferrite circulators; metamaterials; microstrip components; disk shaped circulator; ferrite devices; ferrite-coupled-line circulator; insertion loss; left handed ferrite circulator; negative permeability frequency; nonreciprocal microstrip lines; perpendicularly magnetized ferrite substrate; triangular shaped circulator; Bandwidth; Capacitance; Dielectric substrates; Ferrites; Frequency; Insertion loss; Magnetic fields; Microstrip; Permeability; Wideband; Backward wave; circulators; ferrite devices; ferrite-coupled-lines; left handed circuits; nonreciprocal circuits;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249633
