Design and analysis of Ultra-Wide Band (UWB) antennas based on metamaterial

Abstract

In this paper, a numerical study on the performance of an Ultra-Wide Band (UWB) antennas is constructed, the design and analysis of UWB antennas based on metamaterial of miniaturized geometries for different wireless applications is proposed. Computer Simulation Technology/ Microwave Studio (CSTMWS) software packages based on Finite Integration Technique (FIT) are used to build and analyze the proposed technique to design the metamaterial unit cells and the antenna structures. In this paper, to improve the performance of UWB antennas in term of bandwidth, gain, radiation pattern , and frequency resonance, metamaterial are proposed and constructed from the patches and ground plane mounted on the same substrate of the antenna structures. A systematic study based on FIT of CST MWS formulation is presented, therefore, a specific antenna parameters are readjusted for optimal design approach of the proposed antennas using optimization processes. Two prototypes have been constructed, the first prototypes using four Fractal cells applied at the top of circular shape UWB antenna and the ground plane. The second prototype is made of four modified Split Ring Resonator (SRR) and Capacitive Loaded Strip (CLS) and wire. The performance of the two prototypes is evaluated numerically using CST MWS formulation. Different parametric studies based on numerical simulations is invoked to arrive to the optimal design through monitoring the effects of adding the metamaterial structures on the performance of the proposed antennas. Therefore, these parametric studies are optimized to achieve maximum antenna bandwidth with relatively best gain