Patent ID: 6177908
Filing Date: 2001-01-23
Classification: H01Q

Abstract:
An antenna device comprising:a circuit board on which a circuit-board grounding electrode is disposed;a surface-mounting type antenna mounted on the circuit board, the surface mounting type antenna comprisinga base member made of an insulating material, including a first major surface, a second major surface opposite to the first major surface, and a plurality of side surfaces extending between the first and second major surfaces;a grounding electrode covering substantially the entire area of the first major surface of the base member;a strip-like radiation electrode disposed on the second major surface, the radiation electrode having a first end and a second end, the first end comprising an open-ended terminal;a connecting terminal connected to the second end of the radiation electrode;a power-supply electrode disposed in the vicinity of the open-ended terminal of the radiation electrode; anda power-supply terminal connected to the power-supply electrode, andthe connecting terminal of the surface-mounting type antenna being connected to the circuit-board grounding electrode through an inductance circuit provided on the circuit board.