Short-range communication system
First Claim
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1. A short-range communication system, comprising:
- an antenna defined by an electrical conductor arranged in a plane, said conductor forming a coil with rings thereof being uniformly spaced;
a transmitter spaced apart from said plane of said coil by a gap, said transmitter transmitting an electromagnetic wave towards said coil, said wave being an amplitude-modulated and asynchronous signal indicative of a data stream of known peak amplitude wherein said coil is excited to resonance in correspondence with said amplitude-modulated and asynchronous signal; and
a receiver coupled to said coil for detecting said resonance and an actual peak amplitude associated therewith wherein said actual peak amplitude is indicative of the magnitude of said gap, said receiver further decoding said resonance to recover said data stream.
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Abstract
A short-range communication system includes an antenna, a transmitter, and a receiver. The antenna is an electrical conductor formed as a planar coil with rings thereof being uniformly spaced. The transmitter is spaced apart from the plane of the coil by a gap. An amplitude-modulated and asynchronous signal indicative of a data stream of known peak amplitude is transmitted into the gap. The receiver detects the coil'"'"'s resonance and decodes same to recover the data stream.
2 Citations
17 Claims
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1. A short-range communication system, comprising:
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an antenna defined by an electrical conductor arranged in a plane, said conductor forming a coil with rings thereof being uniformly spaced; a transmitter spaced apart from said plane of said coil by a gap, said transmitter transmitting an electromagnetic wave towards said coil, said wave being an amplitude-modulated and asynchronous signal indicative of a data stream of known peak amplitude wherein said coil is excited to resonance in correspondence with said amplitude-modulated and asynchronous signal; and a receiver coupled to said coil for detecting said resonance and an actual peak amplitude associated therewith wherein said actual peak amplitude is indicative of the magnitude of said gap, said receiver further decoding said resonance to recover said data stream. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A short-range communication system, comprising:
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an antenna defined by an electrical conductor having a first end and a second end, said conductor formed in a plane as a coil with portions of said coil being uniformly spaced and parallel along an axis of said plane; a transmitter spaced apart from said plane of said coil by a gap, said transmitter transmitting an electromagnetic wave towards said coil, said wave being an amplitude-modulated and asynchronous signal indicative of a data stream of known peak amplitude wherein said coil is excited to resonance in correspondence with said amplitude-modulated and asynchronous signal, said transmitter further being adapted for movement in a direction aligned with said axis; and a receiver coupled to said first end and said second end of said coil for detecting said resonance and an actual peak amplitude associated therewith wherein said actual peak amplitude is indicative of the magnitude of said gap, said receiver further decoding said resonance to recover said data stream. - View Dependent Claims (9, 10, 11, 12)
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13. A short-range communication system, comprising:
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an antenna defined by an electrical conductor having a first end and a second end, said conductor formed in a plane as a coil with portions of said coil being uniformly spaced and parallel along an axis of said plane; a transmitter spaced apart from said plane of said coil by a gap, said transmitter transmitting an electromagnetic wave towards said coil, said wave being an amplitude-modulated and asynchronous signal indicative of a data stream of known peak amplitude wherein said coil is excited to resonance in correspondence with said amplitude-modulated and asynchronous signal; means coupled to said transmitter for moving said transmitter in a direction aligned with said axis; and a receiver coupled to said first end and said second end of said coil for detecting said resonance and an actual peak amplitude associated therewith wherein said actual peak amplitude is indicative of the magnitude of said gap, said receiver further decoding said resonance to recover said data stream. - View Dependent Claims (14, 15, 16, 17)
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Specification