Ultra-Wide-Band Microstrip Concentric Annular Ring Antenna for Wireless Communications
In this paper, a new design technique for bandwidth enhancement of concentric microstrip annular ring slot antennas is presented. Using this technique, an Ultra-Wide-Band antenna is designed with simulated bandwidth of 111.29%. Microstrip patch antennas are widely used because of their several advantages such as light weight, low volume, low fabrication cost, and capability of dual, triple and several frequency operations. However microstrip antennas suffer from a number of disadvantages, particularly the narrow bandwidth. This is a serious limitation of these microstrip patch antennas.