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A simple compact wideband aperture coupled rectangular dielectric resonator antenna (RDRA) loaded with similar parasitic dielectric elements separated by low dielectric spacers as air gap layers is designed. The bandwidths of the proposed RDRAs are signiflcantly enhanced as compared with the bandwidth of the driven DRA without an air gap. The measurement results are verifled experimentally for a one parasitic element case. A bandwidth of 18% and 27% with VSWR better than 2 is achieved for double and triple gaps, respectively. It is interesting to point out that radiation patterns are stable in the entire operation band.

COMPACT WIDEBAND RECTANGULAR DIELECTRIC RESONATOR ANTENNA WITH PARASITIC ELEMENTS AND AIR GAPS