A Miniaturized Wideband Antenna for Vehicular Communication, WiMAX, and WLAN Applications

A compact wideband microstrip antenna operating over 5.45 GHz - 7.47 GHz bandwidth is reported. The design uses double rectangular type annular-ring structured patch, along with a circular arc at each corner acting as defected metal structure (DMS) and two triangular-shaped defects in the ground plane acting as defected ground structures (DGS). The annular ring contributes to increase bandwidth of basic microstrip antenna and further enhancement in bandwidth is achieved by combination of both DMS and DGS. The design is implemented on a RT/Duroid 5880 TM substrate. The overall design size is 14 mm×18 mm. The maximum simulated gain of the proposed antenna is 7.8 dBi. Hence, the proposed design is found suitable for vehicle to vehicle communication in Intelligent Transport System (ITS), WiMAX, WLAN, downlink of X-band and satellite communication and other applications operating in ultra wideband frequency range.