An Analysis on Edge-Guide Mode Isolator by FDTD Method

Toshiro KODERA  Yutaka SATOMURA  Makoto TSUTSUMI  

IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.8   pp.1678-1684
Publication Date: 2003/08/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
ferrite media,  ferrite edge-guide mode,  FDTD method,  gyromagnetic equation,  

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So far, a lot of analyses have been performed on the edge-guide mode isolator with one short edge. However, the detailed characteristics such as the influence of shape of a metal strip and the thickness of a ferrite substrate have not been revealed. This paper clarifies the influence of the structure on the frequency response both experimentally and numerically. The numerical analysis is performed by the FDTD method. The numerical results indicate that the frequency response does not depend on the thickness of ferrite substrate but does on the shape of the metal strip. Furthermore, based on the numerical results, the experiment is carried out on the prototype isolator. All the results provide a theory of the optimum design on the isolator.