A simple circuit model including mutual coupling for dielectric resonator antenna array

A simple circuit model is presented for modeling substrate integrated waveguide (SIW) series-fed dielectric resonator antenna (DRA) array. The mutual coupling between antenna elements is taken into account in the model. A single-element and a two-element antenna structures are simulated first using full-wave solver. The mutual coupling between antennas is then extracted and subsequently plugged into the circuit model for the antenna array. A millimeter-wave DRA array example is used to validate the model. The S-parameters calculated using the model agrees well with the full-wave solver results.