Four port diversity patch antennas for MIMO WLAN application

摘要

A four port diversity microstrip patch antennas for WLAN was designed, working in the 5.180 to 5.220 GHz frequency. Port diversity was carried out by changing the orientation of the port as of 90° between each consecutive port to reduce mutual coupling and reduce overall dimensions of the antenna. Dimension of realized antenna was 49.48 mm × 49.48 mm. All antenna element has VSWR ≤ 1.5 and mutual coupling ≤ -20 dB. Bandwidth of the antenna 1 to 4 was 92, 96, 68, and 83 MHz respectively. The resulting gain antenna 1 to 4 was 3.306, 3.428, 3.38, and 3.315 dBi respectively. The antenna had unidirectional radiation pattern with elliptical polarization.