Angularly Stable Band Stop FSS Loaded MIMO Antenna with Enhanced Gain and Low Mutual Coupling

Abstract

This study investigates the use of a slotted patch MIMO antenna to enhance isolation and gain.Two radiators connected by a network of frequency-selective surfaces (FSS) make up the MIMO antenna design.These antenna components are constructed on an FR-4 substrate and are surrounded by FSS units optimised for X-band frequencies.The suggested MIMO antenna is 65 mm in width, 45 mm in length, and 1.6 mm in height.The main objective of using FSS is to enhance both isolation and gain.The FSS unit cells operate at frequencies ranging from 7 to 9 GHz and have exceptional stability throughout polarisation incidence angles.The FSS-loaded antenna has a bandwidth of 8.0 to 8.55 GHz, a peak gain of 6.5 dB, and a MIMO isolation of greater than -20 dB.Furthermore, the research evaluates the MIMO antenna's performance in terms of diversity gain (DG), efficiency, and envelope correlation coefficient (ECC), demonstrating better results when compared to current state-of-the-art approaches.