Analysis of a wire antenna of arbitrary shape

Abstract

A fast yet accurate method for analyzing a wire antenna of arbitrary shape is developed. In addition to the straight line in a wire grid model, a new canonical element, namely, an arc of constant radius of curvature is introduced. For a curvilinear antenna, combination of bent and unbent lines could substantially reduce the fitting error. A technique is devised that solves the vector wave equation on the surface of an arced segment as simple as if it were a straight one. As each segment is relatively long in the enhanced mode, symmetry of the impedance matrix can be fully utilized to speed up the computation. The scheme is used to study some typical curvilinear antennas and excellent results are observed.

Efficient analysis of wire antennas and scatterers with arbitrary shape

“…The simulations for small wire radius was in advance made for verification of the program code in Fortran. The numerical results from this paper and the literature [14], [15] are plotted in Fig. 3(b) and it can be found that our results are in good agreement with those in [14], [15].…”

“…The numerical results from this paper and the literature [14], [15] are plotted in Fig. 3(b) and it can be found that our results are in good agreement with those in [14], [15]. But for a helical antenna with thick radius, the difference is obviously found while the exact kernel and thin-wire approximation are applied individually.…”