Hearing aid with antenna for reception and transmission of electromagnetic signals
First Claim
1. Communication device adapted for placement in a users ear, the device comprising:
- a custom-made 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, anda transmission and reception circuit for transmission and/or reception of electromagnetic energy, the transmission and reception circuit including a planar antenna for radiating and/or receiving electromagnetic energy, the antenna being disposed in relation to the battery such that the antenna has a first surface facing away from the battery and a second surface facing towards the battery, the antenna and battery further being situated in close proximity to each other such that the battery is an electromagnetic shield between the antenna and other parts of the communication device circuitry, thereby preventing the antenna from becoming de-tuned as a result of variations in the position of the other circuitry in the device, and also such that the battery is a ground plane for the antenna.
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Abstract
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 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.
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Citations
16 Claims
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1. Communication device adapted for placement in a users ear, the device comprising:
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a custom-made 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, and a transmission and reception circuit for transmission and/or reception of electromagnetic energy, the transmission and reception circuit including a planar antenna for radiating and/or receiving electromagnetic energy, the antenna being disposed in relation to the battery such that the antenna has a first surface facing away from the battery and a second surface facing towards the battery, the antenna and battery further being situated in close proximity to each other such that the battery is an electromagnetic shield between the antenna and other parts of the communication device circuitry, thereby preventing the antenna from becoming de-tuned as a result of variations in the position of the other circuitry in the device, and also such that the battery is a ground plane for the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of shielding a planar antenna in a hearing aid from de-tuning or electromagnetic noise effects caused by other components in the hearing aid, the method comprising:
preventing the planar antenna from becoming de-tuned as a result of the position of other hearing aid circuitry located inside said hearing aid by disposing the planar antenna, which is part of a transmission and reception circuit, in close proximity to a battery situated inside the hearing aid such that the planar antenna has one surface facing in a sound-gathering direction of the heading aid and an opposite surface facing towards the battery, said preventing including electromagnetically shielding the planar antenna with respect to the other hearing aid components and arranging the battery as a ground plane for the antenna. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
Specification