Array radio imaging based on heterodyne detection with application of the continuous-wave radar technique

S. A. Korolev^a, A. V. Goryunov^a, V. Parshin<sup>b

a</sup> Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
^b Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia

Abstract: A new approach to the creation of millimeter-wave radio imaging systems is proposed. This approach is based on the use of an array receiver consisting of a densely packed (pixel size of 4 mm) array of planar mixers located in the focal plane of a quasi-optical objective, with application of the frequency-modulated continuous-wave radar technique. It has been demonstrated that the implementation of the heterodyne type of reception makes it possible to increase the distance range of the array radio imaging system up to $\sim$100 m while maintaining the angular resolution at the previous level.

Keywords: millimeter-wave imaging, frequency-modulated continuous-wave (FMCW) radar, focal-plane array (FPA) receiver.

Received: 13.08.2021
Revised: 27.09.2021
Accepted: 27.09.2021

DOI: 10.21883/PJTF.2022.01.51880.18992

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