Antenna device and communication apparatus
First Claim
1. An antenna device comprising:
- magnetic layers;
a power supply coil provided on or in the magnetic layers with a winding axis coinciding with a lamination direction of the magnetic layers; and
a first antenna coil and a second antenna coil that are provided on or in the magnetic layers with winding axes coinciding with the lamination direction of the magnetic layers and that generate magnetic field coupling to the power supply coil;
whereinthe power supply coil is located on an inner portion relative to the first antenna coil and the second antenna coil when seen in the lamination direction; and
at least portions of the first antenna coil and the second antenna coil are located on outer portions relative to the power supply coil in the lamination direction.
1 Assignment
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Accused Products
Abstract
An antenna device includes a power supply coil including wire patterns provided on or in magnetic layers and antenna coils including wire patterns provided on or in the magnetic layers. The power supply coil and the antenna coils include coil winding axes thereof coinciding with a lamination direction of the magnetic layers and generate magnetic field coupling to each other. The power supply coil is located on an inner side portion relative to the antenna coils when seen in the lamination direction. At least portions of the antenna coils are located on outer side portions relative to the power supply coil in the lamination direction. With this, an antenna device and a communication apparatus capable of communicating with a communication party reliably without forming an unnecessary communication path with a party-side coil are provided.
3 Citations
20 Claims
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1. An antenna device comprising:
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magnetic layers; a power supply coil provided on or in the magnetic layers with a winding axis coinciding with a lamination direction of the magnetic layers; and a first antenna coil and a second antenna coil that are provided on or in the magnetic layers with winding axes coinciding with the lamination direction of the magnetic layers and that generate magnetic field coupling to the power supply coil;
whereinthe power supply coil is located on an inner portion relative to the first antenna coil and the second antenna coil when seen in the lamination direction; and at least portions of the first antenna coil and the second antenna coil are located on outer portions relative to the power supply coil in the lamination direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification