Wideband Antenna Based on Aperture-Coupled Magneto-Electric Dipole for Millimeter Wave Applications

In this paper, a wideband magneto-electric (ME) dipole antenna is designed, fabricated, and measured. The coaxial probe and aperture coupling technique are employed to excite the ME-dipole. The measured results show that the proposed antenna has the -10dB impedance bandwidth from 18 to 29.5 GHz leading to a 48.1% fractional bandwidth, and a stable gain over the whole operating bandwidth. The antenna element has a compact size of 0.58
$\lambda_{0}\times 0.45\lambda_{0}\times 0.17\lambda_{0}$
. With the advantages of wide bandwidth, stable gain and miniaturization, the proposed antenna has great application potential in millimeter wave communication system.