Quad-Port MIMO Antenna System for n79-5G and WLAN Wireless Communication Applications

The MIMO communication and Wireless LAN antenna operational in 4.6 GHz n79 5G communication band (4.51–4.63 GHz) and 5 GHz (4.97–5.04) WLAN frequency band is presented. The equal and symmetrical four-element four-port antenna has been strip line excited. The slotted structure of the antenna is responsible for the generation of a second resonance in addition to the fundamental mode. The radiation characteristics of the resonator have been optimized through iteration in the patch and slot dimensions. The engineered MIMO antenna has mechanical dimensions of 90 mm × 90 mm etched on an FR4 laminate having a depth of 1.6 mm. The ground plane of the antenna is made defective to improve the antenna bandwidth. The antenna presents an efficiency of 81.24% and 79.34% and a gain of 2.88 dBi and 2.31 dBi at the first and second frequency bands, respectively. The performance validation of simulated results is done by fabrication and measurement through a vector network analyzer in an anechoic chamber environment.