Patent ID: 8456368
Filing Date: 2013-06-04
Classification: H01Q

Abstract:
1. An antenna device comprising: a plate shaped module member to be accommodated within a hollow cylindrical case; an antenna structure disposed on a side position of the module member, the antenna structure comprising: (i) a core including a plurality of magnetic strips layered on each other in a direction perpendicular to a thickness direction of the module member, wherein the core has a central straight part and bent end portions that extend from both ends of the central straight part and that are bent to conform to an inner periphery of the cylindrical case, (ii) a coil wound around the central straight part; and a pair of magnetic flux collectors, each of which is magnetically coupled with a respective one of the bent end portions of the core; wherein each of the pair of magnetic flux collectors comprises a plurality of magnetic plates layered on each other in the thickness direction of the module member, such that the magnetic plates of the magnetic flux collectors are perpendicular to the magnetic strips of the core.