On the Inverse Design of Dielectric Resonator Antenna Structures for Beam-Steering

An existing dielectric resonator antenna (DRA) shape synthesis technique is substantially extended to the multiple-port case in order to realize pattern reconfigurable (beam-steered) versions of such antennas. The shaping procedure is described through reference to a specific class of problem, namely the satisfaction of certain statistical coverage area requirements through pattern reconfigurability. The procedure delivers a shaped DRA that, given the size and location constraints set at the start of the shaping process, has the potential to provide the best coverage possible. At the conclusion of the shaping, which utilizes characteristic mode analysis as a facilitator, a post-shaping step is used to locate the actual feedpoint ports. How closely the best coverage performance can be realized depends on restrictions placed on the beam-steering circuitry by the designer.