Title :
Nonreciprocal left-handed microstrip lines using ferrite substrate
Author :
Tsutsumi, M. ; Ueda, T.
Author_Institution :
Fukui Univ. of Technol., Japan
Abstract :
A ferrite left-handed transmission line has been proposed and investigated for the first time, which is composed of a ferrite microstrip line loaded periodically with capacitances and inductances. The nonreciprocal transmission characteristics with the isolation of greater than 20 dB are numerically obtained by finite element method and demonstrated experimentally in the positive and negative permeability frequency region for edge guided modes when the passband in the left-handed transmission overlaps with the negative permeability frequency region.
Keywords :
ferrite devices; finite element analysis; microstrip lines; periodic structures; permeability; transmission line theory; edge guided modes; ferrite left-handed transmission line; ferrite microstrip line; ferrite substrate; finite element method; frequency region; left-handed microstrip lines; microstrip circuits; negative permeability; nonreciprocal microstrip lines; nonreciprocal transmission; nonreciprocal wave propagation; periodic structures; positive permeability; Capacitance; Dielectric substrates; Electromagnetic scattering; Ferrites; Frequency; Magnetic fields; Microstrip; Permeability; Saturation magnetization; Strips;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1335859
