CPW-fed dual wideband using stub split-ring rectangular slot antenna

This paper presents the design and experimental of dual wideband coplanar waveguide (CPW)-fed using stub split-ring rectangular slot antenna operates in WLAN applications. This antenna is designed for dual frequency used in WLAN system coverage IEEE 802.11b/g (2.4-2.4835 GHz) and IEEE 802.11a (5.15-5.35 GHz). The results of the return loss (S11), gain and radiation pattern of the proposed antenna have been simulated by using antenna analysis software IE3D program. The transmission line and ground plane have been designed to be on the same plane with antenna slot to be applicable for wideband operation. It is found that the proposed antenna is accessible to bandwidth about 40% and 15.47% at frequency range 2-3 GHz and 4.71-5.5 GHz, respectively. Measured maximum gains were approximately 6.74 dBi and 7.01 dBi for 2.45 GHz, 5.2 GHz band, respectively. Finally, simulation and measurement results for the design example are presented and a conclusion follows.