DesignandImplementationofMicrostripAntennaswithFractal PatchandDefectedGroundPlaneforPerformanceEnhancement

Abstract

This research sought to analyze the effects of incorporating arbitrarily shaped defectedgroundplanestructures(ConcentricRing-shapedandDoubleE-shapeddefected ground plane structures) in the ground plane of a conventional microstrip antenna, to achievemultibandperformanceandbandwidthenhancement. Theresearchalsosought to analyze the effects of incorporating arbitrary fractal geometries (based on fractal concentric rectangles) in the patch of a conventional microstrip antenna, aimed at size reduction. In addition, this research also sought to design arbitrary fractal antennas on defected ground plane structures geared towards improvement of the multiband capabilities and bandwidth enhancement of the microstrip antenna, without increasing the antenna size. The effects of the three design techniques (defected ground plane structure, fractal design and a combination of fractal design on a defected ground plane) on antenna performance parameters such as return loss, VSWR, current distribution andradiationpatternswerefairlyanalyzedthroughdesignandsimulationusingHFSS simulation software.