ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE USING SAME

摘要

[PROBLEMS] To realize an antenna device having wider bands, maintaining a high gain in each band and omnidirectinality of a vertically polarized wave, and installed in a narrow space and to provide a technique of maintaining a mechanical reliability. [MEANS FOR SOLVING PROBLEMS] An antenna device comprises a generally U-shaped conductor antenna whose one end is a feeding section, whose the other end is an open end, and which has a folded section, a base made of an insulating material, and a board on which the conductor antenna and the base are mounted. The conductor surface of the one end of the conductor antenna is generally perpendicular to that of the other end. The base is secured to the board. At least one end of the conductor antenna is secured to the base. The folded section is secured to the board.