Spread spectrum non-linear junction detector
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United States of America Patent
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Dec 8, 2015
Grant Date -
Mar 12, 2015
app pub date -
Sep 9, 2013
filing date -
Sep 9, 2013
priority date (Note) -
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Abstract
A digital spread spectrum non-linear junction detector (NLJD) utilizes the 2.4 GHz transmission band to increase sensitivity to detect smaller electronics. The receiver chain of the NLJD pre-distorts the transmission signal and correlates the result with the response signal to differentiate between target responses and ambient interference signals. A touch screen display displays a signal strength received by the NLJDs receiver at a second harmonic frequency of the 2.4 GHz transmit signal and a signal strength received by the receiver at a third harmonic frequency of the transmit signal. A frequency swept response received by the receiver in response to the transmitted 2.4 GHz transmit signal is graphically displayed on the touch screen. The use of the 2.4 GHz band, touch screen, correlation based target differentiation and frequency swept response display improve the sensitivity and usability of the NLJD and increase the likelihood of it successfully performing its tasks.
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