DGS-Based Quad Element Planar Array for WLAN Application with Enhanced Performance

The proposed assembly comprises of 2 × 2 antenna elements with defected ground structure (DGS) to resonate at 5.8 GHz for WLAN application, where each antenna element excited by inset feeding technique. The proposed MIMO array has achieved - 10 dB bandwidth of 85 MHz with 36.5% reduction in antenna area with similar radiating element. Besides, the proposed design also achieved high radiation efficiency of 95% with a peak directivity of 11.94 dBi. The antenna resonates at the designated frequency with a minimum return loss of - 42dB. The results include parametric study by subtracting more slots from the ground and placed them in horizontal direction. The obtained antenna array can be used for WLAN application with low manufacturing cost.