Moment Solution for Radiation and Scattering from Conducting Cylinders, TM Case

摘要

A computer program is described for the problem of transverse magnetic radiation and scattering from two-dimensional perfectly conducting polygonal cylinders of arbitrary cross-section. Three possible excitations are considered: an incident transverse-magnetic plane wave; an electric line source parallel to the axis of the scatterers; and an electric field in an aperture. The program computes induced surface currents, scattering cross sections for plane wave incidence, far field gain patterns for aperture excitation, and normalized radiation patterns for electric line source excitations. The solution is accomplished by the method of moments through which the integral equation is expressible as a matrix equation. A point-matching technique is used with impulses as weighting functions and pulses for expansion functions. Cases of plane wave scattering for both induced current and scattered field showed agreement as did aperture radiation and line current radiation. The program listing, instructions for use, and sample input-output data are included.