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IEEE Transactions on Antennas and Propagation
Volume 46 Number 2, February 1998

Backscattering of TE Waves by Periodical Surface with Dielectric Cover

Page 176.

Abstract:

Several types of periodical surfaces are studied on their backscattering to a normally incident TE plane wave. The surfaces are perfect conductor and are covered with dielectric materials to make a flat surface due to aerodynamic consideration. The effects of frequency, surface profile shape, period-to-depth ratio, and cover permittivity are analyzed. It is observed that a sawtooth profile can be used to reduce the backscattering at high frequencies and elliptical profiles can be used to reduce the backscattering at certain low frequencies when a cover material is filled in the grooves.

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