Design of Single-Band Circularly Polarized Dielectric Resonator Antenna Using A Higher-Order Mode

Abstract –A singly-fed dual-band circularly polarized dielectric resonator antenna (DRA) is investigated in this paper. Basically we are using CST soft. For the simulation. It makes use of the fundamental TE111mode and higher-order TE113mode of a rectangular DRA for the dual band design. The DRA has a square cross section. It is excited by a single micro strip line-fed rectangular slot fed. To generate circularly polarized (CP) field pattern, two corners of the DRA are truncated at 45o, exciting two sets of degenerate orthogonal modes, namely (TE111x, TE111y) and (TE113x, TE113y). Measured results show that the fractional bandwidth of respective DRA is 67%. This shows that the desired antenna is ultra-wideband antenna. The reflection coefficient, axial ratio, radiation pattern, and gain of the antenna are studied using CST MICROWAVE STUDIO. Measurements were carried out to verify the simulations and reasonable agreement between the measured and simulated results is observed