Novel ultra wideband antennas for wireless systems

摘要: This thesis focuses on Ultra Wideband (UWB) antenna designs and analysis. Studies have been undertaken covering the areas of UWB fundamentals theory. wireless technology is being considered as solution to overcome data rate bottlenecks in communications applications. able achieve high transmission rates because it transmits over a very large spectrum frequencies from 3.1 GHz 10.6 (7.5 GHz). Consequently, provides many challenges for design arena, including design. The main objective this study, design, analyze implement novel low profile printed patch antennas that satisfy requirements. Several techniques are used optimal bandwidth performance thesis. planar PCBs. Therefore, research introduces five microstrip-fed, small, low-profile, microstrip using different bandwidth-enhancement bandwidth. According their geometrical shapes, they can be classified into two types: first types stepped which namely: stepped-trapezoidal trimmed notch-cut antenna. second ones beveled an elliptical antenna, double-beveled band-rejected It has demonstrated numerically experimentally proposed suitable systems. They provide satisfactory frequency domain performance, ultra-wide with nearly omni-directional radiation patterns, relatively flat gain good efficiency. These features make them applications, such personal area networks (WPANs) applications