Antenna device and wireless communication device
First Claim
Patent Images
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;
whereinthe 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.
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Abstract
An antenna device includes a first coil antenna and a second coil antenna. The first coil antenna includes a coil conductor having a rectangular or substantially rectangular spiral shape and located on a non-magnetic insulating base member. The second coil antenna includes two coil conductors located on a non-magnetic insulating base member. The two coil conductors are disposed and wound such that loops of a magnetic field that is generated by applying a current to the two coil conductors are perpendicular or substantially perpendicular to a coil axis of the coil conductors.
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Citations
17 Claims
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1. An antenna device comprising:
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a first coil antenna; and a second coil antenna that is disposed in a vicinity of the first coil antenna;
whereinthe 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless communication device comprising:
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an antenna device that includes a first coil antenna and a second coil antenna disposed in a vicinity of the first coil antenna;
whereinthe 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. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification