Near-field electromagnetic induction (NFEMI) antenna
First Claim
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1. A near-field electromagnetic induction (NFEMI) antenna, comprising:
- an electric antenna including a first electrically conductive planar surface;
a magnetic antenna including a first coil coupled to a second coil;
a first feeding connection coupled to one end of the first coil;
a second feeding connection coupled to another end of the first coil and one end of the second coil;
wherein another end of the second coil is connected to the electrically conductive surface; and
a magnetic permeable material coupled to one side of the magnetic antenna and configured to be placed between the magnetic antenna and a set of electric components;
wherein the first coil is a planar spiral coil; and
wherein the first coil is configured to function as a second electrically conductive surface in the electric antenna by physically facing the first electrically conductive planar surface.
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Abstract
One example discloses a near-field electromagnetic induction (NFEMI) antenna, including: an electric antenna including a first electrically conductive surface; a magnetic antenna including a first coil (L1) coupled to a second coil (L2); a first feeding connection coupled to one end of the first coil; a second feeding connection coupled to another end of the first coil and one end of the second coil; wherein a another end of the second coil is connected to the electrically conductive surface; and a magnetic permeable material coupled to one side of the magnetic antenna and configured to be placed between the magnetic antenna and a set of electric components.
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Citations
18 Claims
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1. A near-field electromagnetic induction (NFEMI) antenna, comprising:
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an electric antenna including a first electrically conductive planar surface; a magnetic antenna including a first coil coupled to a second coil; a first feeding connection coupled to one end of the first coil; a second feeding connection coupled to another end of the first coil and one end of the second coil; wherein another end of the second coil is connected to the electrically conductive surface; and a magnetic permeable material coupled to one side of the magnetic antenna and configured to be placed between the magnetic antenna and a set of electric components; wherein the first coil is a planar spiral coil; and wherein the first coil is configured to function as a second electrically conductive surface in the electric antenna by physically facing the first electrically conductive planar surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wearable device, comprising:
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an electric antenna including a first electrically conductive planar surface; a magnetic antenna including a first coil coupled to a second coil; a first feeding connection coupled to one end of the first coil; a second feeding connection coupled to another end of the first coil and one end of the second coil; wherein another end of the second coil is connected to the electrically conductive surface; and a magnetic permeable material coupled to one side of the magnetic antenna and configured to be placed between the magnetic antenna and a set of electric components; wherein the electric and magnetic antennas form a near-field electromagnetic induction (NFEMI) antenna; wherein the first coil is a planar spiral coil; and wherein the first coil is configured to function as a second electrically conductive surface in the electric antenna by physically facing the first electrically conductive planar surface. - View Dependent Claims (16, 17, 18)
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Specification