Compact Multiband Handset Antenna Design for Covering 5G Frequency Bands

New multiband antenna array structure with high gain is proposed for 5G communication handheld systems (700MHz/3.5 GHz and 28/38 GHz). The designed structure is proposed using a combination of sub-6GHz and mm-Wave antenna arrays. The antenna is based on S-shaped strip etched on the top side to operate at 700 MHz. On the other hand, the 3.5GHz band is generated by coupling a meander line to an inverted-C strip on the bottom side. Finally, the mm-Wave antenna array is based on four quadrupole elements with a 1:4 microstrip power divider. This configuration ensures that all four quadrupole antennas receive in-phase feeding power. Obtained results confirm that the designed antenna array achieves gains of 4.6 dBi, 10.5 dBi, at sub-6 GHz and mm-Wave band, respectively. Owing to its simplicity and compactness, the proposed handset antenna is a good candidate for 5G multiband applications.