Hearing device including antenna unit

1. A hearing device comprising a housing that is configured to at least partly be positioned in the ear canal of a wearer, the housing having a first part configured for extending into the ear canal of the wearer and a second part configured to be positioned towards or at the opening of the ear canal of the wearer, the hearing device comprising:

an input transducer for registering ambient sound and providing an electrical signal representing the ambient sound,

a sound processor for processing the electrical signal,

an output transducer to provide the processed electrical signal to the wearer,

a single wire constituting an antenna unit for reception and/or emission of electromagnetic energy, the antenna unit being positioned in the second part of the housing, wherein the antenna unit is arranged in an at least partial loop with a free end of the at least partial loop being arranged in the vicinity of a power source so as to allow the power source to be used as a ground plane for the antenna unit,

a communication unit for processing of data to be transmitted or received via the antenna unit, and

a transmission line connecting the communication unit and the antenna unit, the transmission line configured to transfer a signal from the communication unit to the antenna unit and/or from the antenna unit to the communication unit, so as to minimize parasitic effects on the antenna unit, wherein at least part of the transmission line is at least partly shielded, wherein the transmission line is terminated at a battery spring inside the housing.

2. The hearing device according to claim 1 , wherein the antenna unit is at least partly embedded or in-molded in a faceplate of the housing and/or a lid of a battery drawer and/or is at least partly situated in contact with an inner surface of a faceplate of the housing.

3. The hearing device according to claim 1 , wherein the antenna unit comprises a flex print and/or one or more conductive wires.

4. The hearing device according to claim 1 , wherein the transmission line is or at least includes a coaxial cable, microstrip line, a strip line, coupled lines, a twisted line pair, a flex print or a combination thereof.

5. The hearing device according to claim 4 , wherein the transmission line is a coaxial cable and the shield of the coaxial cable is terminated at the battery spring.

6. The hearing device according to claim 1 , wherein the housing includes an extractor cord for removing and/or inserting the hearing device in the ear canal of the wearer, and the antenna unit is at least partly disposed within the extractor cord, optionally the antenna unit is at least partly coiled within the extractor cord.

7. The hearing device according to claim 6 , wherein a part of the antenna unit is disposed in the housing and optionally the part of the antenna unit disposed in the housing is at least partly coiled inside the housing.

8. The hearing device according to claim 1 , wherein the wire constituting the antenna unit is wound at least party around the power source.

9. The hearing device according to claim 1 , wherein the housing is custom formed to the intended user's ear canal.

10. The hearing device according to claim 1 , wherein the antenna unit is positioned between one or more electrical components inside the housing and the outer part of the second part of the housing.

11. The hearing device according to claim 1 , wherein the antenna unit is configured to operate in the frequency range of 1 GHz to 10 GHz.

12. The hearing device according to claim 1 , wherein the hearing device is configured to communicate using the Bluetooth protocol.

13. The hearing device according to claim 1 , wherein the hearing device is a hearing aid.

14. The hearing device according to claim 1 , wherein the antenna unit includes a flex print and/or a lead and is arranged in a loop or a partial loop or a helix like structure or a patch or a slot antenna or an inverted F-antenna, or a combination thereof.

15. The hearing device according to claim 1 , wherein the antenna unit is at least partly embedded or in-molded in a faceplate of the housing and/or a lid of a battery drawer and/or is at least partly situated in contact with an inner surface of a faceplate of the housing.

16. The hearing device according to claim 1 , wherein the antenna unit is at least partly embedded or in-molded in a faceplate of the housing and/or a lid of a battery drawer and/or is at least partly situated in contact with an inner surface of a faceplate of the housing.

17. The hearing device according to claim 1 , wherein the antenna unit comprises a flex print and/or one or more conductive wires.

18. The hearing device according to claim 1 , wherein the antenna unit comprises a flex print and/or one or more conductive wires.

19. The hearing device according to claim 1 , wherein the antenna unit, at a distal end opposite to the free end of the at least partial loop, is terminated at a microphone component.