Gain enhancement of microstrip patch antenna using I-shaped Mushroom-like EBG structure for WLAN application

This paper present the microstrip patch antenna with I-shaped mushroom like EBG structure for gain enhancement. By properly placing the electromagnetic band gap (EBG) structure around radiating patch, the gain of a conventional microstrip patch antenna is improved. In order to achieve the EBG operation for wireless local area network of U-NII 1 and 2 bands, the EBG structure is formed by using the I-shaped resonator. The radiation pattern results indicate that the gain of the proposed antenna is improved of around 2 dBi at the operating frequency of 5.2 GHz. Moreover, the suppression of side- and back-lobe radiation is achieved by the presence of EBG structure.