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Characterizations of crystal‐grid filter in quasi‐optical circuits using 3‐D anisotropic FDTD formulation and Floquet boundary condition
Author(s) -
Ren Jishi,
Wang Xudong,
Hwu R. Jennifer
Publication year - 1998
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19981205)19:5<342::aid-mop9>3.0.co;2-e
Subject(s) - anisotropy , finite difference time domain method , optics , floquet theory , electric field , grid , microwave , materials science , physics , computational physics , geometry , mathematics , quantum mechanics , nonlinear system
An analysis of an anisotropic crystal grid plate used in quasioptical circuits is presented in this paper. The 3‐D anisotropy FDTD formulation using the permeability tensor is directly implemented with necessary treatments on the local fields specified by the relationship between the electric displacement and field, as well as on the air–anisotropy interface. The Floquet boundary condition using one unit cell and a pulse excitation are employed for the analysis of the large grid–anisotropy plate. The simulated results of field rotation, transmittance, reflectance, as well as the effects of the grid on the anisotropy plate are obtained, and show excellent agreement with experiments. © 1998 John Wiley & Sons, Inc. Microwave Opt Technol Lett 19: 342–348, 1998.