To provide a portable wireless device which can be opened/closed in two directions, namely, in the vertical directions and the horizontal directions, and achieves high antenna performance without external antenna, even if the device is opened in the vertical directions or the horizontal directions.
A case dipole antenna structure has antenna elements 10, 11 in a lower case 4 and an upper case 5, and the lower case 4 and the upper case 5 are turnably connected by two shafts of hinges 2, 3. Thus, the cases can be opened/closed in two directions, namely, the vertical directions and the horizontal directions, and the high antenna performance is achieved, without the external antenna, when the structure is opened in either the vertical direction or the horizontal direction. A power feed section 9 and a connecting section 15 are separated one from the other by 1/20 of the wavelength that corresponds to an operation frequency or higher Thus, power is fed properly to the antenna elements 10, 11.
SUMI SHINGO
HAYAMA HIDEKI
KAKITSU HARUHIKO
YAMAZAKI YUKARI
Toshimitsu Ichikawa
Kimihide Hashimoto