Active Signal Interference
First Claim
Patent Images
1. A circuit comprising:
- a power module comprising an antenna, the power module to generate power from a carrier signal received by the antenna; and
a subcarrier generator powered by the power module when the carrier signal is received regardless of a communication protocol used in transmitting the carrier signal, wherein the subcarrier generator generates an obscuring signal configured to obscure an information signal generated by another circuit energized by the carrier signal.
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Accused Products
Abstract
The subject matter of this specification can be embodied in, among other things, a circuit that includes a power module that includes an antenna. The power module is configured to generate power from a carrier signal received by the antenna. The circuit also includes a subcarrier generator powered by the power module when the carrier signal is received regardless of a communication protocol used in transmitting the carrier signal. The subcarrier generator generates an obscuring signal configured to obscure an information signal generated by another circuit energized by the carrier signal.
33 Citations
23 Claims
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1. A circuit comprising:
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a power module comprising an antenna, the power module to generate power from a carrier signal received by the antenna; and a subcarrier generator powered by the power module when the carrier signal is received regardless of a communication protocol used in transmitting the carrier signal, wherein the subcarrier generator generates an obscuring signal configured to obscure an information signal generated by another circuit energized by the carrier signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system comprising:
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an information circuit comprising a transponder for receiving a radio frequency (RF) carrier signal from a RF reader and transmitting an information signal having information in response to the RF carrier signal; and a blocking circuit comprising a transponder for receiving the RF carrier signal and transmitting an obscuring signal in response to the RF carrier signal regardless of a communication protocol used by the RF reader for transmission of the RF carrier signal, the obscuring signal preventing the RF reader from extracting the information from the information signal. - View Dependent Claims (19, 20, 21, 22)
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23. A method comprising:
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receiving, at a first circuit, a carrier signal to energize the first circuit; and transmitting, regardless of a communication protocol used in transmission of the carrier signal, a blocking signal at a frequency to interfere with an information signal transmitted by a second circuit energized by the carrier signal.
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Specification