Ultra-Wideband Harmonic Radar for Locating Radio-Frequency Electronics

Report No. ARL-TR-7256
Authors: Gregory J Mazzaro, Kyle A Gallagher, Albert R Owens, Kelly D Sherbondy, and Ram M Narayanan
Date/Pages: March 2015; 46 pages
Abstract: This report describes a type of nonlinear radar that detects and locates nonlinear (electronic) targets using ultra-wideband transmission and harmonic reception. Data are presented for a successful test of an experimental harmonic radar at transmit frequencies between 700 and 900 MHz and an output power of 2 W. Detection is accomplished by measuring a signal reflected from the target at double the transmit frequency. Ranging is accomplished by sweeping the transmit frequencies across an ultrawide bandwidth, capturing the amplitude and phase of the harmonic return signal, and computing an inverse Fourier transform of the wideband harmonic response. Detection and ranging of 3 nonlinear targets are demonstrated at standoff distances of 6 and 12 ft.
Distribution: Approved for public release
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Last Update / Reviewed: March 1, 2015