Perturbed Sierpinski Carpet Antenna With CPW Feed for IEEE 802.11 a/b WLAN Application

A printed antenna useful for IEEE 802.11 a/b WLAN application is proposed in this letter. The antenna adopts a modified Sierpinski carpet geometry in planar monopole configuration. Design steps to achieve the desired resonance characteristics are discussed. Return loss characteristics suggest that the antenna is also suitable for HiperLAN2 system. The peak realized antenna gain is around 3.2 dBi at the lower band and 4.5 dBi at the higher band.