Antennas for standard fit hearing assistance devices
An embodiment of a hearing assistance device comprises a housing, a power source, a radio circuit, an antenna and a transmission line. The radio circuit is within the housing and electrically connected to the power source. The antenna has an aperture, and the radio circuit is at least substantially within the aperture. The transmission line electrically connects to the antenna to the radio circuit. Various antenna embodiments include a flex circuit antenna.
1. A hearing assistance device, comprising:
a housing including an outer shell;
a power source within the housing;
a radio circuit within the housing and electrically connected to the power source;
a flex antenna configured to be wrapped around the outside surface of the outer shell and having an aperture oriented orthogonal to the axis of symmetry of the hearing assistance device, wherein the radio circuit is at least substantially within the aperture, wherein the power source is not within the aperture, and wherein ends of the flex antenna are physically connected at a seam to fix a wrapped position around the housing; and
a transmission line integrally formed with the flex antenna and configured to electrically connect to the radio circuit, wherein the housing includes a channel around the radio circuit, the channel configured to receive at least a portion of the flex antenna.
2. The device of claim 1 , wherein the radio circuit includes a hybrid radio circuit.
3. The device of claim 2 , wherein the hybrid radio circuit includes a radio, an EPROM and a digital signal processor.
4. The device of claim 1 , further comprising a microphone, a receiver, and signal processing circuitry connected to the flex antenna, the microphone and the receiver.
5. The device of claim 4 , wherein the microphone and the receiver are not within the aperture of the flex antenna.
6. The device of claim 1 , wherein the flex antenna includes a conductor layer between dielectric layers.
7. The device of claim 6 , wherein the dielectric layers include a polyimide material.
8. The device of claim 6 , wherein the conductor layer includes copper.
9. The device of claim 1 , wherein the hearing assistance device includes a hearing aid.
10. The device of claim 9 , wherein the hearing aid includes a behind-the-ear (BTE) hearing aid.
11. The device of claim 9 , wherein the hearing aid includes an on-the-ear (OTE) hearing aid.
12. The device of claim 9 , wherein the hearing aid includes an in-the-ear (ITE) hearing aid.
13. The device of claim 9 , wherein the hearing aid includes a completely-in-the-canal (CIC) hearing aid.
14. A method of forming a hearing assistance device, comprising:
placing a radio circuit and a power source within a housing of the device, wherein the housing includes an outer shell;
looping a flex antenna around the outside surface of the outer shell to form an aperture oriented orthogonal to the axis of symmetry of the hearing assistance device, wherein the radio circuit is at least substantially within the aperture, and wherein the power source is not within the aperture;
electrically connecting a flexible circuit portion to the radio circuit using a transmission line integrally formed with the flex antenna; and
physically connecting ends of the flex antenna at a seam to fix a wrapped position around the housing, wherein the housing includes a channel around the radio circuit, the channel configured to receive at least a portion of the flex antenna.
15. The method of claim 14 , further comprising electrically connecting the radio circuit to a microphone in the housing and to a receiver in the housing, wherein the microphone and the receiver are not within the aperture.
16. The method of claim 14 , wherein placing a radio circuit within a housing of the device includes placing a radio circuit within a housing of a BTE hearing aid.
17. The method of claim 14 , wherein placing a radio circuit within a housing of the device includes placing a radio circuit within a housing of an OTE hearing aid.
18. The method of claim 14 , wherein placing a radio circuit within a housing of the device includes placing a radio circuit within a housing of an ITE hearing aid.
19. The method of claim 14 , wherein placing a radio circuit within a housing of the device includes placing a radio circuit within a housing of a CIC hearing aid.
20. The method of claim 14 , wherein placing a radio circuit within a housing of the device includes placing a hybrid radio circuit within a housing of the device.