On the modeling of arbitrarily-shaped printed circuit antennas

Abstract

A numerical technique has recently been developed to deal with printed circuit antennas with arbitrary shapes via the method of moments (see H. Nakano et al. 1987). However, the drawback of this numerical approach is the lack of efficient evaluation of impedance matrix elements when the moment method is enforced. It is shown that the image extraction method of C.L. Chi (1987) can be used to enhance the computation efficiency significantly. The analysis is based on the decomposition of the dynamic Green's function. One of the applications of this efficient numerical technique is to study the radiation characteristics of a printed spiral antenna. A printed spiral antenna composed of semi-ellipses is considered as a numerical example.<>