Design and analysis of multiband annular slot antenna with metamaterial array structure for intelligent transportation communication systems

In the recent years, personal and mobile communications networks have developed rapidly, causing an increasing need for affordable, compact and easily integrated antennas. The increasing demand for wireless internet access, wireless cable television, among others, will force such systems to provide high throughput, and simultaneous access to different systems through the same device, which can be accomplished with multiband technology. Recent developments make it possible to build a transmitter and receiver on a single chip at low cost. The intelligent transportation system (ITS) applications will use very low radiated power levels, usually less than a milli-watt. These capabilities are possible with current solid state electronics and low-cost chips can be made to perform a wide range of applications. The proposed antenna structure using metamaterial array structure has been designed, fabricated and analyzed using a commercial software. The radiation characteristics, such as, return loss, VSWR, input impedance, radiation patterns and the surface current densities have been introduced, which offered excellent performance and have measured lower return loss up to -22.87 dB with absolute bandwidth 1.1 GHz.