Antenna device and mobile wireless terminal

摘要

A dual band built-in antenna device operable in a first frequency band and a second frequency band is provided. The antenna device comprises a ground plane comprising a ground member, a first inverted-L line antenna element for the first frequency band, and a second inverted-L line antenna element for the second frequency band. The first and second inverted-L line antenna elements are so constructed that the elements are extended in respective directions, that are further separated from each other as the antenna elements extend further from a starting position. The starting position is set in proximity to a power feed point within a plane parallel to the ground plane.