RF antenna and hearing device with RF antenna
The present disclosure relates to a hearing aid with an RF antenna arranged within the hearing aid's housing, and a loudspeaker positioned in the ear canal of the user. The RF antenna is configured to receive and/or transmit electromagnetic RF signals within a first frequency range enclosing a first frequency of resonance of the RF antenna corresponding to a first wavelength. The hearing aid further comprises one or more electric leads electrically connected to lead one or more electric signals within a second frequency range not overlapping the first frequency range between the loudspeaker in the ear canal of the user and an electronic circuit in the housing, with the one or more electrical leads being decoupled, at a connector end of the one or more electrical leads, by means of one or more decoupling components.
1. A hearing aid comprising:
a housing;
an RF antenna arranged in the housing, the RF antenna configured to receive and/or transmit electromagnetic RF signals within a first frequency range;
an electronic component configured to send electric signals to and/or receive electric signals from an electronic circuit via an electric lead, wherein the electric signals are within a second frequency range that does not overlap with the first frequency range;
a decoupling element connecting the electric lead to the electronic circuit; and
a capacitor connecting at least one of the electric lead and the electronic component to the antenna.
2. The hearing aid according to claim 1 , wherein the electronic component is a loudspeaker configured to be positioned in the ear canal of the user, and wherein the one or more electrical leads together forms a composite lead structure consisting of a number of consecutive segments separated by planes extending perpendicularly to the direction of current flow in the leads.
3. The hearing aid according to claim 2 , wherein the hearing aid housing is a single unit whereto the loudspeaker is mechanically connected via the electric connection.
4. The hearing aid according to claim 2 , wherein the hearing aid housing is a single unit in which the loudspeaker is arranged.
5. The hearing aid according to claim 1 , wherein the decoupling component is configured to reflect and/or attenuate signals within the first frequency range and pass signals within the second frequency range.
6. The hearing aid according to claim 1 , wherein the decoupling component is positioned on the same substrate as the electric lead.
7. The hearing aid according to claim 6 , wherein
the substrate is a printed circuit board having a ground plane; and
the hearing aid further comprises a battery and the printed circuit board comprises a battery terminal, which is arranged primarily at a feed end of the antenna element.
8. The hearing aid according to claim 1 , wherein a surface of the antenna element completely surrounds the closest projection the electric lead or the decoupling element for communicating onto said surface of the antenna element.
9. The hearing aid according to claim 1 , wherein the antenna element comprises two electrically conductive layers electrically connected to each other, and wherein the electric lead is arranged between the two electrically conductive layers.
10. The hearing aid according to claim 1 , wherein the electronic component is a microphone.
11. The hearing aid according to claim 1 , wherein the lead and/or at least a portion of the electronic component is arranged within a distance of less than 2% of the first wavelength from the antenna element.
12. The hearing aid according to claim 1 , wherein the total surface area of the antennal element is at least 3 time the total surface area of the electronic component and the electric lead.
13. A hearing aid comprising:
a housing;
an RF antenna arranged in the housing, the RF antenna configured to receive and/or transmit electromagnetic RF signals within a first frequency range;
an electronic component configured to send electric signals to and/or receive electric signals from an electronic circuit via an electric lead, wherein the electric signals are within a second frequency range that does not overlap with the first frequency range;
a decoupling element connecting the electric lead to the electronic circuit; the decoupling element being arranged at a first side of a substrate, the RF antenna being arranged at a second side of a substrate opposite the first side of a substrate.
14. The hearing aid according to claim 13 , wherein the hearing aid housing is a single unit in which the loudspeaker is arranged.
15. The hearing aid according to claim 13 , wherein the electronic component is a signal processor.