Electromagnetic Band Gap (EBG) has become one of the most promising technologies to be applied for antenna applications. Research in EBG field has recently received remarkable interest and potentially destined as the future wireless technology. EBG offers the potential for novel and unique capabilities to manipulate electromagnetic waves. In this paper, Multisize EBG structures were investigated. Studies were carried with the goal to explore the possibility of achieving a wide stopband region by employing a multisize arrangement. Investigations were carried for four types of shapes including Circular, Square, Koch-square and Fractal-minkowski. Promising results show that multisize EBG design with equal edge gap offers a wide stopband region with deep attenuation, while sustaining the compact size. Arrangement of the multisize EBG patch is a significant factor in achieving the desired wide stopband as well as the patch’s and via’s size.
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