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A Dual-Band Antenna Array with High Gain and Miniaturized Structure

This paper presents a dual-band antenna array with high gain and miniaturized structure which can be applicated to 5G communication systems. The antenna array is composed of two monopole elements. By protruding the ground branches in the metal plane of the antenna array, the isolation between these two elements has been improved greatly and the size has been reduced. The fabricated sample is measured and the results are in perfect accordance with simulation. These results show the designed antenna array with dual operating frequency band from 3.23 GHz to 4.16 GHz and from 4.6 GHz to 5.54 GHz. Its isolation is lower than -15 dB which covers the middle-frequency band of commercial 5G system. Especially, the size of proposed antenna array is 42×34×1.6 mm3 only. It can be used in handheld wireless devices in the 5G application.