Calculation of self-impedance and radiation efficiency of a dipole near a lossy cylinder with arbitrary cross section by using the moment method and a spectrum of two-dimensional solutions

We present a computation method for the self-impedance and radiation efficiency of a dipole near a lossy dielectric cylinder with arbitrary cross section by using a spectrum of two-dimensional (2-D) solutions. The 2-D solutions for the spectral Green's functions of the cylinder as well as the 3-D solution for the current on the dipole are found by the method of moments (MoM). The 2-D MoM approach makes use of the algorithm G2DMULT (Green's function of 2-D multiregion structures). The geometry of a dipole near a lossy circular dielectric cylinder is, in a parallel work, used to validate a reverberation chamber for measuring the radiation efficiency and self-impedance of small antennas. Therefore, the results in the present paper could be verified against results from other numerical programs and from measurements in both an anechoic chamber and a reverberation chamber. (C) 2002 John Wiley & Sons, Inc.