Abstract
In this paper, an Electromagnetic Band Gap (EBG) based structure is proposed and simulated with other conventional structures on a thick substrate, to tackle the narrow bandwidth problem in microstrip patch antenna, and to take advantage of using a high permittivity substrate in terms of compactness. However, using this later degrades the antenna’s radiation pattern and gain even further. An optimized mushroom like EBG structure using Genetic Algorithm (GA) is used to cover the frequency band of interest, two different bandgap characterization methods were used to determine it. The results show significant improvements in terms of the bandwidth, gain and radiation pattern compared to the use of thick substrate.
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