Antenna device

An antenna device configured to be used in contact with or close to a human body or a conductor, the antenna device comprising:

• an antenna;
• and
• a metasurface layer that is layered on the antenna, disposed on a human body side, and includes a plurality of low-loss films and a plurality of metasurfaces formed on the plurality of low-loss films, wherein
• the plurality of low-loss films includes a first-layer low-loss film and a second-layer low-loss film that are layered,
• the plurality of metasurfaces includes a first-layer metasurface made of a plurality of first-layer electrodes formed on the first-layer low-loss film and a second-layer metasurface made of a plurality of second-layer electrodes formed on the second-layer low-loss film,
• the plurality of first-layer electrodes is disposed to at least partially overlap the plurality of second-layer electrodes in a planar view, and
• the plurality of second-layer electrodes is disposed to at least partially overlap the plurality of first-layer electrodes in the planar view.

An antenna device comprising:

• an antenna;
• and
• an antenna film layered on the antenna, wherein the antenna film includes
• a first low-loss film,
• a second low-loss film layered with the first low-loss film, and
• a ground,
• wherein a first conductor pattern is formed on an upper surface of the first low-loss film,
• wherein a first through-hole extends from the first conductor pattern to the ground and configures an antenna feed,
• wherein a second conductor pattern is formed on an upper surface of the second low-loss film, and
• wherein the second conductor pattern is larger in area than the first conductor pattern.