Wireless device

A wireless device comprising:

• an antenna;
• a focuser including at least a first region and a second region, one of the first region and the second region transmitting radio waves, and the other blocking radio waves or changing the phase of radio waves;
• and
• a radio wave absorber, wherein
• the shape of the first region is a circle in a plan view from the antenna,
• the shape of the second region is an annular ring with an inner diameter equal to the diameter of the first region in a plan view from the antenna,
• the antenna is on the center axis of the circle of the first region,
• at least part of the radio wave absorber is present between a first plane which is perpendicular to the center axis and on which the antenna is present and a second plane which is perpendicular to the center axis and on which the second region is present, and
• the radio wave absorber is present at a position away from the antenna by the outer circumference of the annular ring of the second region or longer in a first direction perpendicular to the center axis.