Antenna device

An antenna device disposed on a first surface, a second surface parallel with the first surface, and a third surface connecting the first surface and the second surface and perpendicular to the first surface and to the second surface, the antenna device comprising:

• a first antenna disposed on the first surface and the third surface;
• a second antenna disposed on the second surface;
• and
• a ground line disposed on the first surface, wherein the first antenna includes:
• a first feedpoint disposed on the first surface;
• a first element, the first element being conductive, being disposed on the first surface, and extending from the first feedpoint to the third surface;
• and
• a second element, the second element being conductive, being disposed on the third surface, and extending in a direction along the first surface from an end of the first element,
• the second antenna includes:
• a second feedpoint disposed in a manner separated from the first feedpoint in a direction parallel with the first surface and the second surface;
• and
• an antenna element, the antenna element being conductive and extending from the second feedpoint, and
• the ground line includes:
• a ground point grounded;
• and
• a ground line element, the ground line element being conductive, being connected to the ground point, including a portion extending in a direction along the first antenna, and being capacitively coupled to the first antenna,
• wherein
• the portion of the ground line element, the portion extending in the direction along the first antenna, includes a portion extending in a direction along the second element,
• a distance between the portion extending in the direction along the second element and the second element is less than or equal to 1/100 of a wavelength corresponding to a resonance frequency band of the first antenna, and
• the ground point is connected to a ground member grounded, and a loop antenna is formed by the first antenna, the ground line element, and the ground member.