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US 9,806,421 B1Granted
NFC antenna system for metalized devices
AssigneeEthertronics, Inc.
InventorsOlivier Pajona, Laurent Desclos, Seng Thail Sron, Jaakko Kyllonen
Life of this patent
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Abstract
An antenna system is described for implementation in devices enclosed in a metallic enclosure, where a small opening is introduced in the metallic enclosure and a magnetic field is generated external to the metallic enclosure for use in near field communication applications. An antenna structure is described that is internal to the metallic enclosure that generates a magnetic field on the axis of the opening in the metallic enclosure.
Claims22
An antenna system comprising:
- a conductor in the form of a wire or planar trace wrapped or deposited on the outer surface of a non-metallic support to form a coil, wherein a first end of the coil coupled to a common ground and a second end of the coil coupled to a transceiver;
- a first metallic enclosure enclosing said coil, the first metallic enclosure having a first end and a second end opposing the first end, the first end and the second opposing end containing no metallization and coincident with a first plane and a second plane forming the first end and the second end of said coil;
- a ground plane forming the common ground;
- the first metallic enclosure positioned in close proximity to the ground plane, and is electrically coupled to the ground plane;
- the first end of said coil further coupled to the first metallic enclosure and/or the ground plane;
- and
- said coil configured to operate at a first frequency.
4 more elements
The antenna system of claim, 1 wherein a volume of material within the inner region of said coil having material possessing dielectric properties and/or magnetic properties.
An antenna system comprising:
- a first conductor in the form of a wire or planar trace wrapped or deposited on the outer surface of a first non-metallic support to form a first coil, wherein a first end of the first coil coupled to a common ground and a second end of the first coil coupled to a transceiver;
- a first metallic enclosure enclosing said first coil, the first metallic enclosure having a first end and a second end opposing the first end, the first end and the second opposing end containing no metallization and coincident with a first plane and a second plane forming the first end and the second end of said coil;
- a ground plane forming the common ground;
- a second conductor in the form of a wire or planar trace wrapped or deposited on the outer surface of a second non-metallic support to form a second coil, wherein a first end of the second coil coupled to the common ground and a second end of the second coil coupled to the transceiver;
- a second metallic enclosure enclosing said second coil, the second metallic enclosure having a first end and a second end opposing the first end, the first end and the second opposing end containing no metallization and coincident with a first plane and a second plane forming the first end and the second end of said second coil;
- the first metallic enclosure positioned in close proximity to the ground plane, and is electrically coupled to the ground plane;
- the first end of said first coil further coupled to the first metallic enclosure and/or the ground plane;
- said first coil configured to operate at a first radio frequency;
- the second metallic enclosure positioned in close proximity to the ground plane at an opposing end of said ground plane opposing to the first metallic enclosure, the second metallic enclosure electrically coupled to the ground plane;
- the first end of said second coil further coupled to the second metallic enclosure and/or the ground plane;
- said second coil configured to operate at the first radio frequency;
- and
- the first metallic enclosure, the second metallic enclosure, and the ground plane enclosed in a third metallic enclosure.
10 more elements
An antenna system comprising:
- a conductor in the form of a wire or planar trace wrapped or deposited on the outer surface of a non-metallic support to form a coil, wherein a first end of the coil coupled to a common ground and a second end of the coil coupled to a transceiver;
- a first metallic enclosure enclosing said coil, the first metallic enclosure having a first end and a second end opposing the first end, the first end and the second opposing end containing no metallization and coincident with a first plane and a second plane forming the first end and the second end of said coil;
- a ground plane forming the common ground, wherein the ground plane is coupled to a printed circuit board;
- the first metallic enclosure positioned in close proximity to the ground plane, and is electrically coupled to the ground plane;
- the first end of said coil further coupled to the first metallic enclosure and/or the ground plane;
- wherein the first metallic enclosure and the ground plane are enclosed in a second metallic enclosure including an aperture aligned with the first end of the first metallic enclosure;
- and
- said coil configured to operate at a first frequency.
5 more elements
Dependencies are inferred from the claim text.