Patent ID: 8319572

Claim:
An electromagnetic bandgap structure comprising: a plurality of first conductive plates, placed on a first planar surface; a plurality of second conductive plates, placed on a second planar surface; a first conductive trace, configured to electrically connect any two adjacent first conductive plates with each other on the first planar surface, the two adjacent first conductive plates lined up in a first direction among the plurality of first conductive plates; a second conductive trace, configured to electrically connect any two adjacent second conductive plates with each other on the second planar surface, the two adjacent second conductive plates lined up in the first direction among the plurality of second conductive plates; a first stitching via, configured to electrically connect any two adjacent conductive portions with each other, the two adjacent conductive portions lined up in a direction that is different from the first direction on the first planar surface by having a part of the first stitching via pass through a planar surface that is different from the first planar surface, wherein the two adjacent conductive portions placed on the first planar surface include at least one of the plurality of first conductive plates; and a second stitching via, configured to electrically connect any two adjacent conductive portions with each other, the two adjacent conductive portions lined up in a direction that is different from the first direction on the second planar surface by having a part of the second stitching via pass through a planar surface that is different from the second planar surface, wherein the two adjacent conductive portions placed on the second planar surface include at least one of the plurality of second conductive plates.