Radiation Performance of an Elliptical Patch Antenna with Three Orthogonal Sector Slots

The paper presents design and radiation performance of an el- liptical patch antenna with three orthogonal sector slots and its performance is compared with that of a conventional elliptical microstrip patch antenna (EMPA) operating under similar test conditions. The proposed elliptical mi- crostrip patch antenna has two sector slots along the major axes aligned opposite to each other and a sector slot orthogonal to these two slots and aligned along the minor axis. The location and dimensions of these sector slots are optimized to obtain improved bandwidth close to 10.96% which is nearly four times higher than that of a conventional EMPA tested under identical test conditions. The gain of antenna is marginally improved still it needs further improvement. The measured E and H plane co and cross polar patterns of modified antenna are also present for better understanding. The modified antenna meets the band- width requirements for the IEEE 802.11 a5 wireless local area network (WLAN) applications.