Antenna device

摘要

Provided is an antenna device (1) including: an antenna element (120); a substrate (100) on which a ground conductor is provided; a first feeding portion (130); a second feeding portion (140); and a switching section (111, 131, 141). A direction in which high frequency electric current mainly flows in the ground conductor is different from while the first feeding portion (130) feeds the antenna element (120) to while the second feeding portion (140) feeds the antenna element (120).

主权项

1. An antenna device comprising:
an antenna element; a substrate on which a ground conductor is provided; a first feeding portion and a second feeding portion, provided on the substrate, each for feeding the antenna element; and a switching section for switching which one of the first feeding portion and the second feeding portion feeds the antenna element, a direction in which high frequency electric current mainly flows in the ground conductor being different between when the first feeding portion feeds the antenna element and when the second feeding portion feeds the antenna element, wherein the direction is a first direction while the second feeding portion feeds the antenna element, the direction is a second direction orthogonal to the first direction while the first feeding portion feeds the antenna element, and the first feeding portion and the second feeding portion are positioned such that an electric length between the first feeding portion and a center of an electric length of a first path which crosses the ground conductor in the first direction through the first feeding portion is shorter than an electric length between the second feeding portion and a center of an electric length of a second path which crosses the ground conductor in the first direction through the second feeding portion.