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A circularly polarized rectangular dielectric resonator antenna (DRA) has been designed (3.7–4.2 GHz) for WiMAX, satellite, and sub-6 GHz 5G NR band communications. A new T-shaped monopole has been used to excite the rectangular DRA. Using proposed conformal metal strip, the higher-order degenerate modes TE δ 13 x and TE 1 δ 3 y have been excited to achieve circular polarization (CP) with improved gain. Further, the bandwidths enhancement has been achieved by placing a parasitic patch of optimized height and width at a specific distance from T-shaped strip on DRA surface to cover the desired frequency band. A signaficant enhancement of~ 73% in the impedance-matching bandwidth and~ 75.5% in axial ratio (AR) bandwidth has been achieved. The| S 11|≤ 10 dB over a wide bandwidth of~ 17.3% has been offered by the antenna. A broad axial ratio bandwidth of~ 17.2% along with a useful gain …