Non-contact antenna feed
View Patent ↗The present disclosure relates to inclusion of a non-contact antenna. The non-contact antenna can allow a variety of antennas to be used on a hearing assistance device and can overcome issues associated with mounting an antenna internal to the case of a hearing assistance device. A non-contact antenna may include a proximity coupled antenna, such as an antenna mounted on a hearing assistance device case (external to the case) near a feed line that will transfer energy between the antenna and an SMD internal to the case. A non-contact antenna may include an aperture coupled antenna, such as an antenna mounted external to the case on an antenna substrate, where the antenna substrate is on a feed substrate with a feed line, and where there is an aperture in a ground plane.
1. A hearing assistance device comprising:
a housing including processing circuitry therein;
a feed line electrically connected to the processing circuitry, the feed line including a first portion internal to the housing and second portion external to the housing;
a dielectric material; and
an antenna mounted on an exterior of the housing in proximity to the second portion of the feed line so as to be separated from the feed line by the dielectric material and electromagnetically coupled with the second portion of the feed line.
2. The device of claim 1 , wherein the antenna is a solid loop antenna.
3. The device of claim 2 , wherein the second portion of the feed line includes a Y-shape opening towards the antenna.
4. The device of claim 1 , wherein the antenna is a Laser Direct Structuring (LDS) antenna including successive layers of conductive material formed on the housing.
5. The device of claim 1 , wherein the antenna is a spiral antenna.
6. The device of claim 5 , wherein the second portion of the feed line includes a Y-shape opening towards the antenna.
7. The device of claim 1 , wherein the antenna, dielectric material , and feed line form a metal-insulator-metal (MIM) capacitor configured to help match an impedance of the antenna to an impedance of the feed line.
8. The device of claim 1 , wherein the coupling between the antenna and the feed line is a proximity coupling.
9. A method of forming a non-contact antenna feed for a hearing assistance device, the method comprising:
forming a hearing aid housing, the housing having a selected dielectric constant;
forming an antenna on an exterior side of the housing;
forming a feed line on the housing, a first portion of the feed line deposited on an interior side of the housing and a second portion of the feed line is deposited on the exterior side of the housing, and the second portion of the feed line is in proximity with the antenna so as to be separated from and electromagnetically coupled with the antenna.
10. The method of claim 9 , wherein forming the feed line includes depositing the feed line using Laser Direct Structuring (LDS).
11. The method of claim 9 , wherein the antenna is a spiral antenna.
12. The method of claim 9 , wherein the antenna is a solid loop antenna.
13. The method of claim 9 , wherein forming the antenna and depositing the feed line include situating the antenna and feed line to be separated by a dielectric material so as to form a metal-insulator-metal (MIM) capacitor using the feed line, antenna, and the dielectric material, the MIM capacitor to help match an impedance of the feed line to an impedance of the antenna.