Patent ID: 9692128
Date: 2017-06-27
CPC Classifications: H01L,H01Q

Claim:
1. An antenna device comprising: a first coil antenna; and a second coil antenna that is disposed in a vicinity of the first coil antenna; wherein the first coil antenna includes one coil conductor; the second coil antenna includes two coil conductors wound such that a magnetic field that is generated by the two coil conductors defines a closed magnetic circuit; the two coil conductors of the second coil antenna are wound in a spiral shape when seen in a plan view from a direction of a winding axis of the coil conductor of the first coil antenna; the closed magnetic circuit is disposed in an area inside the coil conductor of the first coil antenna or is disposed in an area outside the coil conductor of the first coil antenna; the first coil antenna is configured for use in a first communication system; and the second coil antenna is configured for use in a second communication system.