Patent ID: 8842055

Claim:
An apparatus comprising: an antenna formed on a substrate; and a high impedance surface (HIS) having a plurality of cells formed on the substrate, wherein the plurality of cells are arranged to form an array that substantially surrounds at least a portion of the antenna, and wherein each cell includes: a ground plane formed on the substrate; a first plate that is formed over and coupled to the ground plane, wherein the first plate is substantially rectangular, and wherein the first plate for each cell is arranged so as to form a first checkered pattern for the array; a second plate that is formed over the first plate, wherein the second plate is substantially rectangular, and wherein the first plate is substantially parallel to the second plate, and wherein the first and second plates are substantially aligned with a central axis that extends generally perpendicular to the first and second plates, and wherein the second plate for each cell is arranged so as to form a second checkered pattern for the array; and an interconnect formed between and coupled to the first and second plates wherein the interconnect further comprises a via; wherein the via further comprises a first via, and wherein each cell further comprises a second via formed between the ground plane and the first plate; wherein the first and second plates are oriented such that the first and second checkered patters are generally coextensive; wherein each cell is about 420 μm×420 μm, and wherein the first via has a diameter of about 60 μm, and wherein the second via has a diameter of about 80 μm, and wherein the first distance is about 15 μm,