Patent ID: 8040287

Claim:
A radio wave receiving device comprising: at least one magnetic drive unit; an antenna structure which includes a narrow core formed of magnetic material and having both end parts and a central part between the both end parts, and a coil wound around the central part of the core; an external magnetic member which is formed of magnetic material, and which includes a magnetic connecting part connected magnetically to one of the both end parts of the core of the antenna structure and a magnetism collecting part expanded in one side of the antenna structure from the magnetic connecting part to exclude the antenna structure, the magnetism collecting part covering the at least one magnetic drive unit in the one side to shut off magnetic flux of external magnetic field from the one side and collecting magnetic flux of radio wave on the one end part of the core of the antenna structure; and another external magnetic member which is formed of magnetic material and which includes a magnetic connecting part connected magnetically to the one of the both end parts of the core of the antenna structure and a magnetism collecting part expanded in the other side of the antenna structure from the magnetic connecting part to exclude the antenna structure, the magnetism collecting part covering the at least one magnetic drive unit in the other side to shut off magnetic flux of external magnetic field from the other side and collecting magnetic flux of radio wave on the one end part of the core of the antenna structure.