Compact wideband antenna for wireless communications

A compact dual-band printed wire antenna for applications in wireless communications is presented. An additional shorted parasitic element to the F-shaped wire antenna is introduced to achieve a dual-band operation. As an example, a new antenna was designed and fabricated for wireless local area network applications that operate in the 2.4 and 5.2/5.8 GHz bands. The prototyped antenna offered two separate measured impedance bandwidths of 700 (2.35-3.05 GHz) and 2150 MHz (3.95-6.1 GHz), for a return loss less than -10 dB. A measured antenna gain of 1.78-1.9 dBi was observed across the lower band, whereas a measured antenna gain of 3.9-4.4 dBi was observed across the upper band. The measured radiation patterns were stable across the passband.