Microstrip Antenna Array with Reduced Mutual Coupling Using Slotted-Ring EBG Structure for 5G Applications

摘要

This paper presents a novel slotted-ring electromagnetic band gap (EBG) structure capable of creating a band gap around 28 GHz by suppressing surface waves propagation. Two-element microstrip patch antenna array are first designed to resonate at 28 GHz, then two rows of slotted-ring EBG structures are placed between these two closely-spaced microstrip antennas. The impedance bandwidth is observed to improve from a single band of 28.2 GHz to a dual-band of 26.5 GHz and 27.6 GHz after the EBG materialis inserted. Also, the mutual coupling between the two antennas is observed to decrease by 30 dB at 27.6 GHz. These results make the proposed antenna a good candidate for 5G wireless Applications. Numerical simulations are employed to obtain the results presented in this paper.