Electromagnetic band gap structure (EBG)

A planar antenna board comprising:

• an antenna substrate layer having a first, planar surface and a second, planar surface opposite the first planar surface;
• a conductive layer located on the first planar surface;
• a first antenna fabricated in the top conductive layer;
• a second antenna fabricated in the top conductive layer;
• a array of H-shaped electromagnetic band-gap (EBG) structures formed within an interior of the conductive layer, the array of H-shaped EBG structures located in a region between the first antenna and the second antenna, wherein each H-shaped EBG structure includes a plurality of slots formed in the conductive layer, wherein the periodic array of H-shaped EBG structures blocks surface waves between the first antenna and the second antenna, each H-shaped EBG structure formed in the top conductive layer exposing the first planar surface of the antenna substrate layer.

A method, comprising:

• providing an antenna substrate layer having a first, planar surface and a second, planar surface located opposite the first, planar surface;
• forming a conductive layer located on the first planar surface;
• forming a first antenna fabricated in the top conductive layer;
• forming a second antenna fabricated in the top conductive layer;
• forming an array comprising a plurality of H-shaped electromagnetic band-gap (EBG) structures arranged in a region between the first antenna and the second antenna within an interior of the conductive layer, each H-shaped EBG structure formed in the top conductive layer exposing the first planar surface of the antenna substrate layer, wherein the array of H-shaped EBG structures blocks surface waves between the first antenna and the second antenna.