Patent ID: 8125401
Filing Date: 2012-02-28
Classification: G06K,H01Q

Abstract:
1. An antenna device comprising: an antenna coil including a magnetic core having a first principal surface, a second principal surface facing the first principal surface, and a curved portion at at least one end of the magnetic core, and a coil provided on the first principal surface of the magnetic core, a coil axis of the coil being substantially perpendicular to the first principal surface, and an opening being disposed at the approximate center of the coil; and a circuit substrate; wherein the antenna coil is arranged to radiate magnetic fluxes; the curved portion is curved in a direction such that the magnetic fluxes are bent towards the circuit substrate and paths of the magnetic fluxes extend to sides of the circuit substrate; and the antenna coil is arranged such that the second principal surface of the magnetic core faces a mounting surface of the circuit substrate.