Antenna apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorsNoboru Kato, Katsumi Taniguchi, Jun Sasaki, Naoki Gouchi
Life of this patent
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Abstract
There is provided an antenna apparatus. A magnetic flux passing through a coil aperture of an antenna coil passes through a conductor aperture of a conductive layer, but the magnetic flux does not pass through the conductive layer. Accordingly, the magnetic flux is diverted to a path in which the conductor aperture of the conductive layer is the inside and the outer edge of the conductive layer is the outside. As a result, the magnetic flux passing through the coil aperture of the antenna coil makes a relatively large loop and links the inside and the outside of a coil conductor in an antenna in a communication partner with the antenna apparatus.
Claims13
An antenna apparatus comprising:
- a coil conductor including a coil aperture at a winding center of the coil conductor;
- a conductive layer including a conductor aperture and a slit connecting the conductor aperture and an outer edge of the conductive layer;
- and
- a radiation plate;
- wherein
- the coil conductor and the conductive layer are configured to be coupled to each other via an electromagnetic field;
- the conductive layer and the radiation plate are configured to be coupled to each other via an electromagnetic field or a magnetic field;
- the conductive layer is provided on an inner surface or an outer surface of a case of an electronic apparatus into which the antenna apparatus is incorporated;
- and
- at least a portion of the conductive layer overlaps the radiation plate in a plan view of the radiation plate.
Dependencies are inferred from the claim text.