Patent ID: 6614398
Filing Date: 2003-09-02
Classification: H01Q,H05K

Abstract:
An antenna structure comprising:a surface-mounted antenna including a base member and a radiating electrode disposed on said base member, the surface-mounted antenna being a &lgr;/4 transmission line type, a first end of the radiating electrode being a ground end and a second end of the radiating electrode being an open end; a mounting board on which the surface-mounted antenna is mounted; an antenna-side control electrode disposed on the base member of the surface-mounted antenna, the antenna-side control electrode having a capacitance between itself and the open end of the radiating electrode; a ground conductor disposed on the mounting board and defining a ground; a board-side control electrode disposed on the mounting board, which is electrically connected with the antenna-side control electrode, and which electrically floats; and a resonant frequency adjusting member having at least one of an inductance and a capacitance, the board-side control electrode being electrically connected with the ground conductor through the resonant frequency adjusting member.