An internal PIFA for 2.4/5 GHz WLAN applications

This paper presents a internal planar inverted-F antenna (PIFA) for 2.4/5 GHz Bluetooth and WLAN applications. The proposed antenna has a small ground plane with the achievement of impedance bandwidth of 110 MHz (2.38 /spl sim/ 2.49 GHz) in the Bluetooth band and 900 MHz (5.1 /spl sim/ 6.0 GHz) near 5 GHz in WLAN band within 2:1 voltage standing wave ratio (VSWR), and an approximately omni-directional radiation pattern is obtained. It also shows a good antenna gain. These features make it alternative for use in dual-band WLAN antenna.