FDTD Analysis and Experiment of Fabry-Perot Cavities at 60 GHz

Ronan SAULEAU  Philippe COQUET  Daniel THOUROUDE  Jean-Pierre DANIEL  Harunobu YUZAWA  Nobumitsu HIROSE  Toshiaki MATSUI  

IEICE TRANSACTIONS on Electronics   Vol.E82-C   No.7   pp.1139-1147
Publication Date: 1999/07/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: Passive Devices and Circuits
FDTD,  Floquet theorem,  dielectric and metallic losses,  Fabry-Perot cavities,  

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The Finite-Difference Time-Domain (FDTD) method has been applied to study the scattering characteristics of Fabry-Perot cavities with infinite planar periodic surfaces. Periodic Boundary Conditions (PBC) are used to reduce the analysis to one unit periodic volume. Both dielectric and metallic losses are included in the algorithm using a frequency dependent formalism. This technique is used to study the frequency response of plane parallel Fabry-Perot cavities with square aperture metal mesh mirrors. These cavities are assumed to be illuminated by a normally incident plane wave. After a detailed description of the algorithm, we show theoretically the separate effects of dielectric and metal losses on the transmission coefficient of such cavities. We compare also simulation results to measurements, in the 60 GHz band, of resonant frequencies and Q factors of cavities with various mesh parameters.