Focal region fields of distorted reflectors
Abstract
The problem of the focal region fields scattered by an arbitrary surface reflector under uniform plane wave illumination is solved. The physical optics (PO) approximation is used to calculate the current induced on the reflector. The surface of the reflector is described by a number of triangular domainwise 5th degree bivariate polynomials. A 2dimensional Gaussian quadrature is employed to numerically evaluate the integral expressions of the scattered fields. No Freshnel or Fraunhofer zone approximations are made. The relation of the focal fields problem to surface compensation techniques and other applications are mentioned. Several examples of distorted parabolic reflectors are presented. The computer code developed is included, together with instructions on its usage.
 Publication:

Final Report North Carolina State Univ
 Pub Date:
 July 1988
 Bibcode:
 1988ncsu.reptR....B
 Keywords:

 Computer Programs;
 Numerical Analysis;
 Parabolic Reflectors;
 Physical Optics;
 Plane Waves;
 Surface Properties;
 Algorithms;
 Approximation;
 Distortion;
 Electromagnetic Scattering;
 Polynomials;
 Communications and Radar