PASSIVE MILLIMETER-WAVE DETECTOR
First Claim
Patent Images
1. A method for detecting a concealed object in a region of interest on a person, comprising:
- scanning said region of interest using a passive millimeter-wave detector comprising an antenna configured to receive millimeter wave radiation;
providing to a processor an output of said scanning by said detector, which output comprises a signal corresponding to an intensity of said received millimeter wave radiation;
in said processor, storing said output of said scanning;
in said processor, processing a plot corresponding to said stored output to identify whether said plot is unimodal or bimodal; and
indicating a result to an operator of said detector, wherein;
if said plot is bimodal, indicating to said operator that a concealed object is potentially detected.
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Accused Products
Abstract
Disclosed are passive millimeter wave detection devices that in some embodiments are useful for detecting objects such as weapons obscured underneath clothing. Also disclosed are methods for detecting objects using millimeter waves, in some embodiments, objects such as weapons, obscured underneath clothing.
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Citations
56 Claims
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1. A method for detecting a concealed object in a region of interest on a person, comprising:
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scanning said region of interest using a passive millimeter-wave detector comprising an antenna configured to receive millimeter wave radiation; providing to a processor an output of said scanning by said detector, which output comprises a signal corresponding to an intensity of said received millimeter wave radiation; in said processor, storing said output of said scanning; in said processor, processing a plot corresponding to said stored output to identify whether said plot is unimodal or bimodal; and indicating a result to an operator of said detector, wherein; if said plot is bimodal, indicating to said operator that a concealed object is potentially detected. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9, 10, 19)
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5. (canceled)
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11-18. -18. (canceled)
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20-29. -29. (canceled)
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30. A passive millimeter wave detector, comprising:
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a directional antenna configured to receive millimeter wave radiation having an intensity from a region of interest, and to output an electrical signal having an amplitude corresponding to said intensity; a high-frequency amplifier functionally associated with said directional antenna and configured to receive said electrical signal, to modulate said signal using a modulating signal, to amplify components of said electrical signal having high frequency, and to provide as output an amplified modulated signal corresponding to said electrical signal having amplified high frequency components; a high-frequency detector functionally associated with said high-frequency amplifier and configured to receive said amplified modulated signal, to restore said modulating signal, and to provide as output a demodulated signal corresponding in amplitude to said amplitude of said electrical signal; a low-frequency amplifier functionally associated with said high-frequency detector and configured to receive said demodulated signal, to amplify components of said demodulated signal having low-frequency, and to provide as output a signal having an amplitude corresponding to said amplitude of said demodulated signal, in digital format; and an intensity indicator functionally associated with said low-frequency amplifier and configured to receive said signal in said digital format and to indicate said intensity of said received millimeter wave radiation. - View Dependent Claims (31, 33, 34, 35, 37, 45, 46, 47, 55)
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32. (canceled)
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36. (canceled)
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38-44. -44. (canceled)
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48-54. -54. (canceled)
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56-61. -61. (canceled)
Specification