A Compact Broadband Dielectric Resonator Magnetoelectric Dipole Antenna

In this paper, a new broadband dielectric resonator magnetoelectric (DR-ME) dipole antenna is proposed. The DR-ME dipole antenna consists of a metal semi-loop, two L-shaped feed lines, and a rectangular dielectric resonator (DR) with a slot. One of the L-shaped lines is excited and the other one is grounded. The feed lines are coupled with the semi-loop to control its electric current distribution. The feeding structure can excite the DR's $\mathbf{TE}_{\boldsymbol{\delta} \mathbf{11}}$ mode. The semi-loop and its image can work as a magnetic dipole while the DR can be equivalent to an electric dipole. Thus, a DR-ME dipole antenna is designed. The electric size of the antenna is $\mathbf{0.29}\boldsymbol{\lambda}_{\mathbf{0}}\times \mathbf{0.29}\boldsymbol{\lambda}_{0}\times \mathbf{0.26}\boldsymbol{\lambda}_{0} ((\boldsymbol{\lambda}_{0}$ is the free-space wavelength at the center frequency). According to the full-wave simulation, the -10 dB bandwidth of the antenna is 18.7%, spanning from 1.98 GHz to 2.39 GHz. The front-to-back ratio is better than 18 dB within the operating band.