Spectral domain full wave analysis of the input impedance of coaxially-fed rectangular microstrip antennas

Abstract

A full-wave spectral domain formulation for the probe-fed rectangular microstrip antenna is presented. The source is modelled by a magnetic-current frill and multiple modes are used in the probe surface current to account for axial and azimuthal variations. To facilitate computation, the attachment mode for the patch current is represented by a fast converging series. Results are compared with measurements in the literature and several features concerning thick substrate effects are noted.