Introduction . Recent years have witnessed an increasing adoption of millimeter-wave (mmWave) imaging across various critical applications, including security scanning1 , 2, non-destructive testing3 , 4, and structural health monitoring5 , 6 , 7, among others. The impetus for this growth can be attributed to several advantages that render mmWave a more appealing imaging modality. In contrast to optical cameras, mmWave is more privacy-preserving, robust to illumi...