Probe feed elliptical patch antenna with slits for WLAN application

This communication presents a comparison in the performance of a normal elliptical microstrip patch antenna with same antenna having loading of sector slits. Required number and dimensions of the slits for bandwidth enhancement are optimized for reliable radiating characteristics. It is found that resonant frequency of the unslotted elliptically patch antenna is about 5.62 GHz, with an operating bandwidth of 3.2% whereas with the loading of three identical slots, resonant frequency is reduced to 5.31 GHz with an impedance bandwidth of order of 13.15%. The proposed antenna demonstrates a much greater operating bandwidth, more than 4.1 times that of an unslotted elliptically patch antenna with better radiation performance. The antenna meets the bandwidth requirements for the IEEE 802.11 a5 wireless local area network (WLAN) applications (5.15-5.35 GHz) within 2: l VSWR.