Analysis of arbitrarily oriented thin wire antennas over a plane imperfect ground
Abstract
This work considers the analysis of thin wire antennas of arbitrary orientation above imperfectly conducting ground planes. Emphasis is placed on the development of fast and accurate techniques for computation of the characteristics of antenna systems. An important problem is the evaluation of certain semiinfinite integrals encountered in the exact Sommerfeld solution. The time required for computation of these integrals is reduced by the application of interpolatory quadrature formulas. Where applicable, a modified method of steepest descent is used to evaluate the integrals. The approximate reflectioncoefficient method is derived from the Sommerfeld formulation via the method of steepest descent. It has been shown that the reflectioncoefficient method is not the farfield approximation. The accuracy for the reflectioncoefficient method relative to the Sommerfeld method is discussed.
 Publication:

Archiv Elektronik und Uebertragungstechnik
 Pub Date:
 November 1977
 Bibcode:
 1977ArElU..31..449S
 Keywords:

 Antenna Radiation Patterns;
 Dipole Antennas;
 Ground Effect (Communications);
 Reflectance;
 Electric Wire;
 Far Fields;
 Integral Equations;
 Interpolation;
 Orientation;
 Orthogonal Functions;
 Quadratures;
 Sommerfeld Approximation;
 Steepest Descent Method;
 Communications and Radar