Efficient Numerical Analysis of Dielectric Resonator Antenna Arrays

Synthetic Functions eXpansion (SFX) is adopted to analyze dielectric resonator antenna (DRA) arrays. First, a two-independent current exciting method is introduced for radiating problems that can be perfectly combined with Rao-Wilton-Glisson functions and T-junctions. Then, a multilevel decomposition scheme is presented to organize the impedance matrix and to generate synthetic functions. This scheme not only expands the application of SFX to a multidielectric system but also benefits the efficiency of SFX. Finally, a four-element DRA array is analyzed using the proposed approach, and results well validate the accuracy and great advantages on efficiency and memory cost of the approach.