Dual-band MIMO Monopole Antenna for 4G and 5G Mobile Communication Devices

In this paper, we present the design of dual-band MIMO antennas for 4G and 5G mobile Sub-6GHz. The proposed antenna consists of an F-shaped monopole operating in the 3.6 GHz band, and a complementary slot of the same size as the F-shaped monopole to cover the 2.6 GHz and 3.6 GHz bands. A two-antenna array placed close to each other on the same FR4 epoxy substrate, measuring 120 × 60 mm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>, equivalent in size to a modern mobile phone. To improve isolation between the two elements, the slot technique is implemented by creating a slot on the ground plane. S-parameters, radiation patterns, and MIMO parameters are presented to illustrate the performance of the MIMO antenna system. The design and simulation are carried out using HFSS software.