In this paper, a Dielectric Resonator Antenna (DRA) is presented for Wireless Local Area Network (WLAN) applications. Here three rectangular dielectric resonators are used as stepped manner. The DRA is excited by microstrip line which is an effective feed mechanism to obtain better radiation. In this design, rectangular shape was used as the dielectric resonator as it offers more option to control the resonant frequency. Simulated results show that DRA array has a better resonant frequency for DR height, hr = 1 mm each and micro strip line fed by at -5.5 mm. The retune loss is 15.0 dBi, directivity achieves 6.2 dBi and the gain of 6.48dBi at 5.5Ghz frequency.