A method for the calculation of properties of wire antennas
Abstract
A symmetricallyfed dipole antenna is considered in the paper. The rigorous integral equation is usually resolved by approximating the kernel, assuming a deltafunction feed, and iterating. To obtain consistent solutions, the sinusoidal current approximation needs to be modified («rounded») at the feed. A modified transmission line approach is equivalent to firstorder iteration by taking a certain value of characteristic impedance. The radiation impedance for a dipole contains the expression for the line reactance within it, and if this term is separated out, the remainder remains finite as the wire radius approaches zero. The iteration approach is equivalent to the usual induced EMF method result if a certain current amplitude is selected, but the result is unsuitable for the full wave dipole. An improved choice is indicated, and is suitable for any dipole length.
 Publication:

Annals of Telecommunications
 Pub Date:
 March 1982
 DOI:
 10.1007/BF02997114
 Bibcode:
 1982AnTel..37..129L
 Keywords:

 Antenna Feeds;
 Dipole Antennas;
 Electric Wire;
 Approximation;
 Delta Function;
 Electrical Impedance;
 Integral Equations;
 Iteration;
 Transmission Lines;
 Communications and Radar;
 Wire antenna;
 Integral equation;
 Approximation;
 Iteration;
 Dipole antenna;
 Antenne fil;
 Equation intégrale;
 Approximaton;
 Itération;
 Antenne doublet