Electromagnetic induction field communication
First Claim
Patent Images
1. A communication system comprising:
- a transmitter located at a first position on a living body, the transmitter having;
a first coil,a first capacitor having first and second plates, said first capacitor connected in parallel with said first coil, said first plate being coupled to the living body at the first position and said second plate being configured to be exposed to an environment, anda signal generator configured to produce a communication signal used to provide current to said first coil to generate a magnetic near field and to provide voltage to said first capacitor to generate an electric near field, wherein said electric near field is coupled to and available around the living body; and
a receiver located at a second position on the living body distant from the first position, the receiver having;
a second coil configured to receive said magnetic near field, wherein said magnetic near field passes through the living body, anda second capacitor, configured to receive said electric near field available around the living body, said second capacitor having third and fourth plates, said second capacitor connected in parallel with said second coil, said third plate being coupled to the living body at the second position and said fourth plate being exposed to the environment, there being no galvanic connection between said transmitter and ground or between said receiver and ground.
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Abstract
Consistent with an example embodiment there is an electromagnetic induction field communication system, illustratively, for communicating on or around the body. Two transceivers (or receiver and transmitter) contain coils and capacitors suitable for generating an electromagnetic induction field surrounding the body and are capable of communicating therebetween.
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Citations
19 Claims
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1. A communication system comprising:
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a transmitter located at a first position on a living body, the transmitter having; a first coil, a first capacitor having first and second plates, said first capacitor connected in parallel with said first coil, said first plate being coupled to the living body at the first position and said second plate being configured to be exposed to an environment, and a signal generator configured to produce a communication signal used to provide current to said first coil to generate a magnetic near field and to provide voltage to said first capacitor to generate an electric near field, wherein said electric near field is coupled to and available around the living body; and a receiver located at a second position on the living body distant from the first position, the receiver having; a second coil configured to receive said magnetic near field, wherein said magnetic near field passes through the living body, and a second capacitor, configured to receive said electric near field available around the living body, said second capacitor having third and fourth plates, said second capacitor connected in parallel with said second coil, said third plate being coupled to the living body at the second position and said fourth plate being exposed to the environment, there being no galvanic connection between said transmitter and ground or between said receiver and ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A communication system transceiver comprising:
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a transmitter located at a first position on a living body, the transmitter comprising; a first coil; a first capacitor having a first plate and a second plate, the first capacitor connected in parallel with the first coil, the first plate placed in closer proximity to the living body than the second plate; and a signal generator configured to produce a generated communication signal used to provide current to the first coil to produce a generated magnetic near field and to provide voltage to the first capacitor to produce a generated electric near field; and a receiver configured to communicate with another transceiver located at a second position on the living body distant from the first position, the receiver comprising; a second coil configured to sense a received magnetic near field; and a second capacitor having a first plate and a second plate, the second capacitor connected in parallel with the second coil, the first plate of the second capacitor placed in closer proximity to the living body than the second plate of the second capacitor, the second capacitor configured to sense a received electric near field, wherein the transmitter further comprises a third capacitor, the third capacitor having a value selected to tune a desired operational frequency of the first coil and first capacitor based on a capacitance value of the first capacitor; and wherein the receiver further comprises a fourth capacitor, the fourth capacitor having a value selected to tune a desired operational frequency of the second coil and second capacitor based on a capacitance value of the second capacitor. - View Dependent Claims (17, 18, 19)
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Specification