ANTENNA

摘要

An antenna is provided with a core side element including a core side feeding point and a ground side element including a ground side feeding point, and is characterized in that the ground side element is arranged to have capacitive coupling with a grounded metal flange, the core side element comprises a first perpendicular wire extending from the core side feeding point in the perpendicular direction departing from the metal flange, and a U-shaped wire connected to an tip end of the first perpendicular wire and having an opening on the side, the total length of the wire from the core side feeding point to one end of the opening of the U-shaped wire is adjusted to be approximately a?/4 and approximately (2n+1)a?'/4 (n is an integer of 0 or more), and the total length of the wire from the core side feeding point to the other end of the opening of the U-shaped wire is approximately a?/6.