PO Diffraction Coefficients for the Surface of Strips on a Grounded Dielectric Slab

Shuguang CHEN  Masayuki OODO  Makoto ANDO  Naohisa GOTO  

IEICE TRANSACTIONS on Electronics   Vol.E78-C   No.10   pp.1433-1439
Publication Date: 1995/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electromagnetic Theory)
diffraction coefficient,  isotropic surface,  anisotropic surface,  artificially soft and hard surfaces,  

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In practical applications of the artificial boundary surfaces, such as corrugation and strips on a grounded dielectric slab, the surfaces have finite sizes. The diffraction fields from anisotropic surface of this kind can not be calculated using conventional diffraction coefficients. In this paper, uniform diffraction coefficients for the strips on a grounded dielectric slab are given in the sense of physical optics, as functions of incident angle, polarization and structural parameters of the surface. Firstly, the incident plane wave is decomposed into the two special polarization directions. Then uniform diffraction coefficients originally derived for isotropic surfaces with arbitrary impedance can be applied for each polarization component. Finally, expressions for the diffraction coefficients from the anisotropic surface are given as the sum of those for two polarization components. The validity of the diffraction coefficients is verified theoretically and experimentally.