Hearing aid with antenna for reception and transmission of electromagnetic signals
The invention regards a communication device which is adapted for placement in a users ear. The communication device comprises a shell part enclosing an input transducer for receiving an input signal, a signal processing device and an output N transducer for providing a signal perceivable as sound, a battery located at a surface part of the shell which is facing away from the head of the user, a transmission and reception circuit for transmission and/or reception of electromagnetic energy. According to the invention an antenna for radiating and/or receiving electromagnetic energy is provided such that it has a first surface turned towards the surroundings and a second surface located in close proximity of the battery.
1. Communication device which is adapted for placement in a users ear and comprises a shell part enclosing an input transducer for receiving an input signal, a signal processing device and an output transducer for providing a signal perceivable as sound, a battery located at a surface part of the shell which is facing away from the head of the user, a transmission and reception circuit for transmission and/or reception of electromagnetic energy, and whereby a planar patch or loop and/or helix antenna for radiating and/or receiving electromagnetic energy is provided, and wherein the antenna is placed in the area between the battery and the surface part of the shell such that it has a first surface turned towards the surroundings and a second surface located in close proximity of the battery, and wherein the antenna is tuned to radiate and/or receive electromagnetic energy in the frequency range of 50 MHz to 50 GHz.
2. Communication device as claimed in claim 1 , wherein the antenna is shaped as a part of a flexprint.
3. Communication device as claimed in claim 1 , wherein the antenna is embedded in material externally of the battery.
4. Communication device as claimed in claim 3 , wherein the antenna is a metal part.
5. Communication device as claimed in claim 1 , wherein the antenna is manufactured by deposition of metal material on surface parts of the faceplate and/or battery drawer.
6. Communication device as claimed in claim 1 , wherein the antenna covers a surface area of the shell which is wider than the projection of the battery onto the faceplate surface.
7. Communication device as claimed in claim 1 , wherein the antenna comprises a loop, which is usable also as a charging loop for a battery.