Near-field electromagnetic induction (nfemi) antenna
AssigneeNXP B.V.
InventorsAnthony Kerselaers, Liesbeth Gommé
Life of this patent
Estimating the term…
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.
Claims19
A near-field electromagnetic induction (NFEMI) antenna, comprising:
- an electric antenna including a first electrically conductive 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 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.
The antenna of claim 8:
- wherein a position of the magnetic permeable material is at least one of:
- between the coils and the first electrically conductive surface;
- or at either end of the stack.
The antenna of claim 10:
- wherein the substrate is at least one of:
- a dielectric material, a ferrite material, air, plastic or a polymer.
The antenna of claim 14:
- wherein the first and second electrically conductive surfaces have substantially matching shapes.
A wearable device, comprising:
- an electric antenna including a first electrically conductive 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 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;
- wherein the electric and magnetic antennas form a near-field electromagnetic induction (NFEMI) antenna.
The antenna of claim 17:
- wherein the antenna is embedded in at least one of:
- a wearable device;
- a smart watch;
- a smartwatch housing, a wireless mobile device, an earbud, a hearing aid, a headphone, an activity tracker, or a heart rate monitor.
Dependencies are inferred from the claim text.