ANTENNA DEVICE AND COMMUNICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an antenna device which can improve communication characteristics while made thin on the whole.

SOLUTION: The antenna device includes a first resonance circuit 111 which is constituted by winding a conductor 101 and inductively coupled to a reader writer 2 transmitting a magnetic field to communicate, and a second resonance circuit 112 having a booster coil 11c constituted by winding a conductor 102, wherein one of the conductors 101 and 102 is wound with the other winding therein with insulating layers 103 interposed, and the resonance circuits 111 and 112 have a resonance frequency equal to an oscillation frequency of the reader writer 2.

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