Full-spectrum passive communication system and method
First Claim
Patent Images
1. A communication device, comprising:
- a passive receiver coupled to an antenna to receive and reflect wide-band ambient radiation, the receiver and antenna configured to modulate the received ambient radiation to form a modulated signal and to transmit the modulated signal via backscatter transmission.
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Abstract
A passive communication system having devices with wide-band antenna circuits configured to receive ambient radiation and to use the energy therefrom to reflect a modulated signal, preferably using backscatter techniques, for writing and reading data to and from the devices in the system.
52 Citations
19 Claims
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1. A communication device, comprising:
a passive receiver coupled to an antenna to receive and reflect wide-band ambient radiation, the receiver and antenna configured to modulate the received ambient radiation to form a modulated signal and to transmit the modulated signal via backscatter transmission.
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2. A communication device, comprising:
a passive receiver having a first wide-band antenna configured to receive ambient radiation, a second antenna configured to receive ambient radiation, a mixer having first and second inputs fed with respective outputs from the first and second antennas, the output from the second antenna delayed at the mixer with respect to the output from the first antenna for comparison and extraction of a modulated signal. - View Dependent Claims (3, 4, 5)
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6. A communication device, comprising:
a passive receiver having a wide-band antenna configured to receive ambient radiation and a circulator circuit configured to mimic input from a second antenna and a mixer configured to receive outputs from a second antenna and a mixer configured to receive outputs from the antenna and the circulator and to extract a modulated signal therefrom.
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7. A communication system, comprising:
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a first passive receiver having an antenna and configured to receive ambient energy, to modulate the received ambient energy to form a modulated signal, and to transmit the modulated signal via backscatter transmission through the antenna; and
a second passive receiver having an antenna circuit configured to receive the ambient energy with the modulated signal, and to extract the modulated signal from the ambient energy. - View Dependent Claims (8, 9, 10)
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11. A communication system, comprising:
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a first passive device having a wide-band antenna circuit and configured to receive wide-band radio frequency radiation and to utilize energy from the received radio frequency radiation to reflect a modulated signal; and
a second passive device configured to receive the wide-band ambient energy and to extract the modulated signal therefrom. - View Dependent Claims (12)
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13. A communication method, comprising:
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receiving ambient radiation at a first passive device having a wide-band antenna circuit configured to receive and utilize the energy from the received ambient radiation to reflect a modulated signal via backscatter transmission; and
receiving at a second passive device the ambient radiation from a wide band of radio frequency transmissions; and
using the energy from the received ambient radiation to detect the modulated signal therein.
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14. A communication method, comprising:
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receiving ambient radiation at a first passive device having a wide-band antenna circuit and utilizing the energy from the received radiation to reflect a modulated signal;
receiving at a second passive device the ambient radiation and the modulated signal and extracting the modulated signal therefrom using the energy from the received ambient radiation; and
using the energy received from the ambient radiation to generate a further modulated signal therefrom for backscatter transmission from the second passive device to the first passive device.
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15. A full spectrum passive communication system, comprising:
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a first passive communication device comprising a passive modulation circuit coupled to a wide-band antenna and configured to receive ambient radiation and to reflect a modulated signal in response thereto; and
a second passive communication device comprising a detection circuit coupled to a first antenna circuit configured to receive ambient radiation and to a second antenna circuit configured to receive ambient radiation, the detection circuit configured to compare the signals received on the first and second antenna circuits to extract the modulated signal. - View Dependent Claims (16, 17, 18, 19)
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Specification