Isolation Enhancement of Tightly Coupled Dual-band MIMO DRA Antennas Using Dual-band Metasurface for Low Cost 5G Applications

Muhammad Yasir Jamal; Min Li; Hashibul Alam; Lijun Jiang

Authors

Muhammad Yasir Jamal UET Lahore
Min Li Department of Electrical and Electronic Engineering, Hong Kong
Hashibul Alam Aliah University, Kolkata India
Lijun Jiang Department of Electrical and Electronic Engineering, Hong Kong

Keywords:

Isolation, DRA Array, Dual-Band, Metasurface, Metamaterial Decoupling, MIMO Antenna, PCB, Mutual Coupling Reduction, Sub-6 GHz 5G

Abstract

In this research work, a dual-band metasurface has been proposed in order to increase the isolation between two closely packed dual-band dielectric resonator antennas (DRAs). The metasurface has been placed only 0.08λ₀ away from the antennas at the center frequency of the lower band. The proposed dual-band metasurface unit cell consists of two copper traces of different lengths printed on both sides of a printed circuit board (PCB). High isolation of more than 20 dB has been achieved for 3.4 and 4.9 GHz 5G bands with impedance bandwidths of more than 200 MHz and 1.4 GHz respectively. The antenna exhibits excellent compactness by reducing the spacing between radiating elements to 0.12λo at 3.5 GHz. The proposed isolation technique can be useful for the applications where PCB of the antenna system is not allowed to be modified.

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