Abstract: A folded EBG structure has a plurality of cells arranged in a two-dimensional array. Each of the cells has an electrically conductive patch and an electrically conductive via coupled between the patch and a ground plane. In one dimension of the folded EBG structure, at least one patch in that dimension is folded into three sections located in different planes. In general, both ends of the folded EBS structure have folded patches. Via walls having electrically conductive vias are provided on both ends of a folded EBG structure for connecting the cell vias to the ground plane. The distance between each via wall and the folded EBGs is substantially equal to the length of the vias connected to patches.

Abstract: A folded EBG structure has a plurality of cells arranged in a two-dimensional array. Each of the cells has an electrically conductive patch and an electrically conductive via coupled between the patch and a ground plane. In one dimension of the folded EBG structure, at least one patch in that dimension is folded into three sections located in different planes. In general, both ends of the folded EBS structure have folded patches. Via walls having electrically conductive vias are provided on both ends of a folded EBG structure for connecting the cell vias to the ground plane. The distance between each via wall and the folded EBGs is substantially equal to the length of the vias connected to patches.