A Magneto-Electric Dipole Antenna Array for Millimeter Wave Applications

In this paper, a low-profile broadband antenna is proposed for future 5G millimeter-wave cellular wireless networks. The proposed antenna is a modified Magneto-Electric (ME) dipole, which consists of four metallic plates, grounded vias, an aperture fed, a ground plane, and a microstrip line feed. The antennas are built on RT/Duroid 5880 substrates and have been realized by the printed circuit board technique. A single-element with an overall of 10x10x1.04mm(3) (similar to 1.26 lambda(o)x1.26 lambda(o) x0.13 lambda(o) at 38GHz) exhibits an impedance matching of 27.9% (32.2-42.8GHz) for vertical bar S-11 vertical bar<-10dB and a realized gain up to 7.5dBi over the frequency band. The usefulness of these antennas as beamforming radiators is demonstrated by a 1 x4 element linear array. Also, a wide-band excitation is applied for the linear ME dipole array to realize a broadband array. The simulated results proved the proposed array can operate in a frequency band spreading from 31.4GHz to 42.1GHz with a gain of 12.5dBi and a side-lobe of -13dB.