Ear-worn devices with high-dielectric structural elements
Ear-worn devices may include one or more structural elements formed of high-dielectric material. The position and shape of the structural element may be selected relative to an antenna of the ear-worn device to provide specific enhancements of the electric and/or magnetic field generated by the antenna. The structural elements may include a host resin material and a plurality of dielectric material elements. The structural elements may have an effective dielectric constant greater than 5. One or more loading strips may be used to tune a resonating structure formed by the antenna and the structural elements. The antenna may be an antenna array with structural elements disposed between elements of the array.
1. An ear-worn device comprising:
an antenna comprising a conductive material configured to provide an electric field in response to a driving signal, wherein:
the antenna includes a first antenna element, a second antenna element, and an antenna feed point,
the antenna feed point is coupled to the first antenna element and the second antenna element and configured to provide the driving signal, and
each of the first antenna element and the second antenna element is formed of the conductive material and is configured to provide the electric field in response to the driving signal from the feed point; and
a structural element, wherein:
at least a part of the structural element is positioned between the first antenna element and the second antenna element,
the structural element is one of: a housing of the ear-worn device, a shell of the ear-worn device, a top case of the ear-worn device, a battery door of the ear-worn device, a faceplate of the ear-worn device, or a spine of the ear-worn device, and
at least the part of the structural element that is positioned between the first antenna element and the second antenna element comprises a host material; and
a plurality of dielectric material elements having a dielectric constant greater than the host material dispersed in the host material.
2. The device of claim 1 , wherein the part of the structural element that is positioned between the first antenna element and the second antenna element does not extend along an entire width of the first antenna element or an entire width of the second antenna element.
3. The device of claim 1 , wherein the plurality of dielectric material elements is dispersed uniformly, or at least substantially uniformly, in the host material.
4. The device of claim 1 , wherein the structural element comprises a faceplate that, together with the shell of the ear-worn device, defines a volume within which the spine of the ear-worn device is disposed.
5. The device of claim 1 , wherein:
the structural element is the top case of the ear-worn device, and
the top case at least partially covers internal electronic components of the ear-wearable device.
6. The device of claim 1 , wherein:
the structural element is the battery door of the ear-worn device, and
a battery of the ear-worn device is configured to be retained by the battery door of the ear-worn device.
7. The device of claim 1 , wherein:
the structural element is the housing of the ear-worn device, and
one or more parts of the housing of the ear-worn device other than the part of the structural element that is positioned between the first antenna element and the second antenna element comprises the host material without any dielectric material elements having the dielectric constant greater than the host resin material.
8. The device of claim 1 , wherein the antenna is a dipole antenna.
9. The device of claim 1 , wherein:
the first antenna element and the second antenna element are each substantially planar and elongate along a length of the ear-worn device,
the first antenna element is disposed on a left side of the ear-worn device, and
the second antenna element is disposed on a right side of the ear-worn device.
10. The device of claim 1 , wherein:
the first antenna element is a conductive patch element; and
the second antenna element is a ground plane element.
11. The device of claim 1 , wherein:
the first and second antenna elements and the antenna source define a nominal antenna wavelength corresponding to a physical antenna length, and
the structural element is coupled to the antenna to define an effective antenna wavelength longer than the nominal antenna wavelength.
12. An ear-worn device comprising:
an antenna comprising a conductive material configured to provide an electric field in response to a driving signal, wherein:
the antenna includes a first antenna element, a second antenna element, and an antenna feed point,
the antenna feed point is coupled to the first antenna element and the second antenna element and configured to provide the driving signal, and
each of the first antenna element and the second antenna element is formed of the conductive material and is configured to provide the electric field in response to the driving signal from the feed point;
internal electronic components;
a housing of the ear-worn device that at least partially covers the internal electronic components of the ear-worn device, wherein the housing comprises a host material; and
a plurality of dielectric material elements having a dielectric constant greater than the host material dispersed in the host material.
13. A method of manufacturing an ear-worn device, the method comprising:
forming a structural element of the ear-worn device, wherein:
the structural element is one of: a housing of the ear-worn device, a shell of the ear-worn device, a top case of the ear-worn device, a battery door of the ear-worn device, a faceplate of the ear-worn device, or a spine of the ear-worn device, and
forming the structural element comprises including, in a host material that is to comprise at least a part of the structural element, a plurality of dielectric material elements having a dielectric constant greater than the host material; and
attaching an antenna to the structural element so that at least the part of the structural element that includes the dielectric material elements is positioned between a first antenna element of the antenna and a second antenna element of the antenna, wherein:
the antenna comprises a conductive material configured to provide an electric field in response to a driving signal,
the antenna includes an antenna feed point that is coupled to the first antenna element and the second antenna element and is configured to provide the driving signal, and
each of the first antenna element and the second antenna element is formed of the conductive material and is configured to provide the electric field in response to the driving signal from the feed point.