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interferometry is used in many fields using all frequencies of the electromagnetic spectrum and sound waves. In this study, data was collected from an FMCW radar is used at multiple heights above a flat surface on which sat a single retroreflector. These data were post-processed to discover the signal obtained from the target and then the phase form the radar at multiple locations was compared. Using the known geometry and measured phase, we find the interferometry is possible using a freerunning radar under certain geometric conditions.
Nait, Assid and Grosch, Theodore
"Interferometry in FMCW Radars,"
The Kennesaw Journal of Undergraduate Research: Vol. 8
, Article 6.
Available at: https://digitalcommons.kennesaw.edu/kjur/vol8/iss1/6