Design of Dual-Band Antenna for 2.45 and 5.8GHz ISM Band

A dual-band microstrip rectangular patch antenna for WLAN in vehicular communication applications is proposed. The aim of this research is to achieve smaller size, better bandwidth and good radiation capability. The designed antenna has a frequency bandwidth of 184MHZ with the upper cut-off frequency of 2.4953GHz and the lower cut-off frequency of 2.3113GHz which are the operating frequencies for IEEE 802.11b/g/n WLAN applications and IEEE 802.15.4 ZigBee application. The second resonance is at 5.8GHz frequency with a bandwidth of (5.850-5.925GHz) the 802.11p standard intended for use in vehicular communication systems and for the mobile operation. The rectangular patch with Inset Line Feed technique is used to design the antennas. First, the design parameters for single element of rectangular patch antenna for 5.8GHz are calculated from the design equations, and then, the design is extended to operate in dual band using the slots at the ground plane and two cylinders at the corners of the slot to obtain good radiation characteristics. The simulation of the proposed antenna has been carried out in computer simulation technology software, and the results are evaluated.