MULTIPORT NETWORK DESCRIPTION AND RADIATION CHARACTERISTICS OF COUPLED DIELECTRIC RESONATOR ANTENNAS

An efficient procedure is presented to investigate the mutual coupling effects and radiation characteristics of dielectric resonator (DR) an tennas operating in an array environment. The procedure is based on th e method of moments (MoM) as applied to a system of surface integral e quations (SIE's) for the coupling of a dielectric body of revolution ( BOR) to a nonBOR geometry. The antenna array elements are situated on a ground plane and fed by coaxial probes. Multiport network impedance parameters computed by this method show good agreement with those obta ined by measurement. Computed driving point impedances are given for a rrays exhibiting optimum pattern performance in terms of Low cross pol arization and good pattern symmetry.