Dual-polarized dielectric resonator antenna excited in HEM12δ mode with enhanced port-to-port isolation

In this paper, a dual linearly polarized cylindrical dielectric resonator antenna excited in higher-order HEM
12δ
mode is presented. The proposed design makes use of annular current sheet in conjunction with 50Ω microstrip line to excite HEM
12δ
mode. The antenna operates at 10.04 GHz and exhibits an impedance bandwidth of 1.3% (9.98–10.11 GHz) for both horizontal and vertical polarizations. The isolation between the ports is better than 30 dB over the operating bandwidth. The peak gain of the proposed antenna is 9.45 dBi at the operating frequency for both horizontal and vertical polarizations. Diversity performance is evaluated in terms of envelope correlation coefficient and its value is below 0.0007 throughout the bandwidth. The proposed antenna could be suitable for polarimetric synthetic aperture radar, 5G communication system and other X-band applications.