Systems, Methods and Apparatuses for Remote Device Detection
First Claim
1. A radar device for detecting improvised explosive trigger devices, comprising:
- a transmitter with frequency adjustability and power adjustability for transmitting electromagnetic signals with a first and second polarization,a tuneable receiver for receiving a reflection of the electromagnetic signal transmitted by the transmitter and at least one harmonic frequency thereof;
an actively controlled cancellation circuit comprising a signal path between the transmitter and the receiver for each of the first polarization and the second polarization of the electromagnetic signal and the at least one harmonic frequency thereof, each signal path consisting essentially of;
i. a directional coupler; and
ii. a reflective load coupled to a terminal of the directional coupler; and
a processor configured to compare at least one output of the actively controlled cancellation circuit to at least one of a previously received output of the actively controlled cancellation circuit and/or a predetermined reference to identify the presence of a conductive wire and/or a non-linear junction within a field of view of the radar device.
1 Assignment
0 Petitions
Accused Products
Abstract
A radar device has a transmitter having a field of view for transmitting a transmit signal and a receiver for receiving a received signal from the field of view of the transmitter. The transmit signal comprising first and second polarization components and multiple frequencies. There is a signal processor programmed to: detect received signal components comprising first and second polarization components and fundamental and harmonic frequencies corresponding to the first and second polarization components and multiple frequencies in the received signal; compare the received signal components to characterize the received signal and identify a remote device as a linear conductor or a non-linear conductor based on predetermined criteria; and generate a notification signal corresponding to the remote device when the remote device is identified.
57 Citations
157 Claims
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1. A radar device for detecting improvised explosive trigger devices, comprising:
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a transmitter with frequency adjustability and power adjustability for transmitting electromagnetic signals with a first and second polarization, a tuneable receiver for receiving a reflection of the electromagnetic signal transmitted by the transmitter and at least one harmonic frequency thereof; an actively controlled cancellation circuit comprising a signal path between the transmitter and the receiver for each of the first polarization and the second polarization of the electromagnetic signal and the at least one harmonic frequency thereof, each signal path consisting essentially of; i. a directional coupler; and ii. a reflective load coupled to a terminal of the directional coupler; and a processor configured to compare at least one output of the actively controlled cancellation circuit to at least one of a previously received output of the actively controlled cancellation circuit and/or a predetermined reference to identify the presence of a conductive wire and/or a non-linear junction within a field of view of the radar device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 22)
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9-21. -21. (canceled)
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23. A device comprising:
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at least one transmitter with frequency adjustability and power adjustability configured to transmit an electromagnetic signal with a first and second polarization at a plurality of frequencies; a command wire detection circuit configured to detect a command wire of an improvised explosive device, comprising; a tuneable receiver comprising; i. a first actively controlled cancellation circuit configured to receive the reflection of the electromagnetic signal with the first polarization; and ii. a second actively controlled cancellation circuit configured to receive the reflection of the electromagnetic signal with the second polarization; a non-linear junction detection circuit configured to detect a non-linear junction within the improvised explosive device, comprising; a receiver comprising; i. a third actively controlled cancellation circuit configured to receive the at least one harmonic of the electromagnetic signal; and a processor configured to compare the at least one output of the command wire detection circuit and/or the non-linear junction detection circuit with a predetermined reference and/or with previously received electromagnetic signals to generate an indication based on the current and previously received electromagnetic signals that can be used to locate the command wire and/or non-linear junction; wherein each actively controlled cancellation circuit comprises a reflective load; wherein the actively controlled cancellation circuit has a rejection level of greater than 50 dB; and wherein the adjustable transmitter is configured to sweep across at least 10 frequencies. - View Dependent Claims (24, 25, 26, 27, 28, 42)
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29-41. -41. (canceled)
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43-152. -152. (canceled)
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153. A method of detecting buried conductors, comprising the steps of:
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transmitting a signal from a transmitter having a field of view, the transmit signal comprising an electromagnetic signal having signal components comprising first and second polarizations and multiple frequencies; receiving a signal from the field of view by a receiver; and detecting first and second polarization components and fundamental and harmonic frequencies corresponding to the first and second polarization components and multiple frequencies in the received signal; comparing the received signal components to characterize the received signal and identify a remote device as a linear electrical component or a non-linear electrical component based on predetermined criteria; and generating a notification signal when the remote device is identified. - View Dependent Claims (154, 155, 156)
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157-168. -168. (canceled)
Specification