Patent ID: 8049578

Claim:
A device, comprising: a first ground plane layer; a first stripline layer, wherein the first stripline layer includes at least a first stripline, and wherein the first stripline of the first stripline layer includes a first geometric configuration; a first spacer layer, wherein the first spacer layer is interconnected to the first ground plane layer on a first side of the first spacer layer, wherein the first spacer layer is interconnected to the first stripline layer on a second side of the first spacer layer, wherein at least a portion of the first stripline layer is separated from the first ground plane layer by a first cavity defined at least in part by a void in the first spacer layer; a second ground plane layer; a second spacer layer, wherein the second spacer layer in interconnected to the first stripline layer on a first side of the second spacer layer, wherein the second spacer layer is interconnected to the second ground plane layer on a second side of the second spacer layer, wherein at least a portion of the first stripline layer is separated from the second ground plane layer by a second cavity defined at least in part by a void in the second spacer layer; a second stripline layer, wherein the second stripline layer includes at least a first stripline, wherein the first stripline of the second stripline layer includes the first geometric configuration, and wherein the first stripline of the second stripline layer is shifted laterally with respect to the first stripline of the first stripline layer; a third spacer layer, wherein the third spacer layer is interconnected to the second ground plane layer on a first side of the third spacer layer, wherein the third spacer layer is interconnected to the second stripline layer on a second side of the third spacer layer, wherein at least a portion of the first stripline of the second stripline layer is separated from the second ground plane layer by a third cavity defined at least in part by the third spacer layer; a third ground plane layer; a fourth spacer layer, wherein the fourth spacer layer is interconnected to the second stripline layer on a first side of the fourth spacer layer, wherein at least a portion of the second stripline layer is separated from the third ground plane by a fourth cavity, and wherein the fourth spacer layer is interconnected to the third ground plane layer on a second side of the fourth spacer layer.