A Low-Profile four-port MIMO Antenna for 5G-n79 Band with high diversity performance

Abstract

This paper presents a simple design of a compact 4-port multiple-input multiple-output (MIMO) microstrip antenna using polarization diversity technique. The proposed structure consists of four monopole elements operating in the fifth generation n79 band (4800–5000 MHz). To achieve good performance with a more compact design, the four identical elements are arranged orthogonally to each other. The proposed antenna is fabricated using a Rogers RT6010 substrate with a compact size of 28 × 28mm2 (0.46 λ0 * 0.46 λ0), where λ0 is the guided wavelength at the lowest generating frequency. The measured results of the manufactured antenna in terms of S-parameters and radiation pattern are in good agreement at the operating frequency band. Moreover, the diversity performance of the proposed MIMO antenna is evaluated through the envelope correlation coefficient (ECC), the diversity gain (DG), the total active reflection coefficient (TARC) and the channel capacity loss (CCL).