A Compact and Wideband Dielectric Resonator Magnetoelectric Dipole Antenna

In this paper, a wideband dielectric resonator antenna (DRA) with magnetoelectric dipole (ME-dipole) characteristic is proposed. The linearly single-polarized antenna prototype is composed of a foam-supported elevated dielectric block fed by a differential metal semi-loop probe. The DRA element in its
$TE_{\delta 11}^{x}$
mode and its metal feeding probe are equivalent to an orthogonal magnetic dipole (MD) and electric dipole (ED), respectively. With an appropriate combination of these two dipole modes, the proposed design achieves a broadside unidirectional radiation with low backward radiation and equal E-plane and H-plane radiation patterns. To verify the design concept, a dual-polarized antenna with the electrical size of 0.42λ
0
× 0.42λ
0
× 0.12λ
0
is designed and analyzed. The simulated front-to-back (FBR) ratio of the proposed antenna is better than 22 dB with 20% relative bandwidth.