Accession Number:

AD0747491

Title:

Scattering of Electromagnetic Waves by a Periodic Surface with Arbitrary Profile

Descriptive Note:

Interim scientific rept.

Corporate Author:

MICHIGAN UNIV ANN ARBOR RADIATION LAB

Personal Author(s):

Report Date:

1972-04-01

Pagination or Media Count:

232.0

Abstract:

Numerical procedures are developed for the digital solution of the integral equations for the current induced on a perfectly conducting, two- dimensional periodic surface of arbitrary profile when a plane electromagnetic wave is incident. By using Floquets theorem the range of integration is reduced to a single period, and special summation techniques consisting of a Poisson summation and the subtraction of the dc term are used to improve the convergence of the infinite series representation of the Greens function. The integral equations are then solved numerically using the moment method and an interpolation scheme. Data are obtained for both the surface and far fields for a variety of sinusoidal, full-wave rectified, inverted full-wave rectified and triangular profiles for plane waves of either polarization at oblique as well as normal incidence, and the results are compared with the predictions of physical optics.

Subject Categories:

  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE