Efficient MIMO Antenna Design for 5.8 GHz Wi-Fi Frequencies Using Stepped Patch Technology

With the recent extension of the Wi-Fi frequency to 5.8 GHz, there is an increasing need for MIMO antennas to enhance channel capacity without increasing bandwidth or transmitted power. This paper presents a design for a stepped patch MIMO antenna optimized to operate at 5.8 GHz. Three patches were designed using standard equations for length and width and stacked on top of each other. The resulting antenna provides 504 MHz of bandwidth and a resonance frequency of 5.8 GHz. The antenna exhibits a low correlation coefficient of 0.0000034, high diversity gain of 9.99, maximum gain of 3.745, and directivity of 5.45. Furthermore, the antenna is compact with dimensions of 36.65mm×72.7mm. This proposed antenna design is ideal for use in compact Wi-Fi routers.