Wideband Low Profile Double Inverted-F Antenna for 5.2/5.8 GHz WLAN and 5.5 GHz WiMAX Applications

Wideband low profile double Inverted-F antenna (DIFA) for 5.2/5.8 GHz WLAN and 5.5 GHz WiMAX applications by means of numerical simulation is presented. The antenna has compact size of 9×20 mm and provides a wide bandwidth of 2.1 GHz (4675 MHz~6775 MHz) which covers the 5.2/5.8 GHz WLAN and 5.5 GHz WiMAX applications. Moreover it has very high peak gain and lower gain variation within the 10 dB return loss bandwidth. The VSWR of DIFA varies from 1.0412 to 1.1960 within the antenna return loss bandwidth. Also the antenna provides peak return loss of -39.0732, -21.6220 and -21.7404 dB at 5.2, 5.5 and 5.8 GHz respectively.