Magnetic Field Antenna
First Claim
Patent Images
1. A magnetic field antenna comprising:
- a) an earplug body having a distal end and a proximal end;
b) a magnetic core section within the earplug body;
c) an antenna coil having at least one turn wrapped at least partially around the magnetic core section;
d) at least one electrical component within the earplug body and electrically coupled to the antenna coil; and
e) an eartip adapter at least partially made of magnetic material and located on the proximal end of the earplug body, the eartip adapter being acoustically coupled to the at least one electrical component.
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Abstract
A magnetic field antenna that provides high efficiency and a compact form factor. Electromagnetic shielding of electrical components used in the antenna is provided, and one embodiment of the invention is a wireless battery-free communications earplug.
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Citations
25 Claims
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1. A magnetic field antenna comprising:
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a) an earplug body having a distal end and a proximal end; b) a magnetic core section within the earplug body; c) an antenna coil having at least one turn wrapped at least partially around the magnetic core section; d) at least one electrical component within the earplug body and electrically coupled to the antenna coil; and e) an eartip adapter at least partially made of magnetic material and located on the proximal end of the earplug body, the eartip adapter being acoustically coupled to the at least one electrical component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A magnetic field antenna comprising:
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a) a body having a distal end and a proximal end; b) a magnetic core section within the body adjacent to the distal end; c) an antenna coil having at least one turn wrapped at least partially around the magnetic core section; and d) at least one electrical component within the body, electrically coupled to the antenna coil, wherein the antenna coil is located such that at least one turn of the antenna coil, projected into a perpendicular field axis plane, circumscribes an area that overlaps at least an area of the at least one electrical component projected onto the perpendicular field axis plane. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A wireless earplug comprising:
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a) an earplug body having a distal end and a proximal end and an outer surface comprising a mechanical barrier adjacent the distal end of the earplug body and a base adjacent the proximal end of the earplug body; b) a magnetic core section within the earplug body inside the mechanical barrier; c) an antenna coil having at least one turn wrapped at least partially around the magnetic core section; d) a speaker having a speaker output, located within the earplug body, and electrically coupled to the antenna coil; e) a magnetic shunt magnetically coupled to the magnetic core section and at least partially enclosing the speaker to provide at least partial magnetic shielding of the speaker; and f) an eartip adapter located on the proximal end of the earplug body, the eartip adapter being acoustically coupled to the speaker output. - View Dependent Claims (23, 24, 25)
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Specification