Patent ID: 8816823

Claim:
A planar electromagnetic wave transmission sheet, comprising; a mesh-like electrode, wherein the width of the electromagnetic transmission sheet perpendicular to the traveling direction of a transmitted electromagnetic wave is substantially equal to a length obtained by multiplying a half of the wavelength of the transmitted electromagnetic wave by a natural number so that a resonance state is obtained in the width direction, wherein the electromagnetic wave transmission sheet creates a transudation area in which electromagnetic field of the transmitted electromagnetic wave exudes on the sheet; wherein the electromagnetic wave transmission sheet has a band-like shape and has long sides in the traveling direction of the transmitted electromagnetic wave and short sides in the width direction, and includes an input interface configured to input the transmitted electromagnetic wave so that the transmitted electromagnetic wave is transmitted in the traveling direction; and wherein an electromagnetic wave absorbing medium is provided on a first short side and the input interface is provided on a second short side that is different from the first short side; the electromagnetic wave absorbing medium configured to reduce reflection of the transmitted electromagnetic wave in the traveling direction, but not comprising: any of the electromagnetic wave absorbing medium configured to reduce reflection of the transmitted electromagnetic wave along the width direction.