Electromagnetic wave transmission sheet and electromagnetic wave transmission device

An electromagnetic wave transmission sheet which is connected to an AC power source and transmits an electromagnetic wave,

• wherein an edge portion which defines a planar shape has two long end sides which have parallel portions extending in parallel to each other, and two short end sides which have parallel portions extending in parallel to each other and are shorter than the long end sides, the two long end sides and the two short end sides are reflection terminals,
• the parallel portion of at least a first short end side out of the two short end sides includes a first portion and a second portion,
• an electromagnetic wave which propagates in a direction substantially parallel to the parallel portions of the long end sides includes:
• a first standing wave formed by a traveling wave directed toward the first portion of the first short end side and a reflected wave reflected by the first portion and directed toward the second short end side;
• and
• a second standing wave formed by a traveling wave directed toward the second portion of the first short end side and a reflected wave reflected by the second portion and directed toward the second short end side, and
• positions of antinodes of the first standing wave and the second standing wave in a direction substantially parallel to the parallel portions of the long end sides are deviated from each other by ¼ of the wavelength of an electromagnetic wave propagating through the electromagnetic wave transmission sheet,
• wherein the first portion of the electromagnetic wave transmission sheet is a short circuited terminal, and the second portion is an open terminal, and when a region on the electromagnetic wave transmission sheet where the first portion of the first short end side extends in the direction parallel to the parallel portions of the long end sides is a first sheet, and a region where the second portion of the first short end side extends in the direction parallel to the parallel portions of the long end sides is a second sheet, a coupler is disposed over the first sheet and the second sheet.