Subterahertz Full-Polarimetric Measurement and ISAR Imaging of Scaled Space Targets

With the increasing significance of full-polarimetric radar systems in monitoring space targets, full-polarimetric inverse synthetic aperture radar (ISAR) data play an essential role in research on the polarization target recognition field. Thus, we construct a full-polarimetric ISAR system operating at the sub-terahertz band in an anechoic chamber, in which three scaled models of typical space targets are measured, calibrated, and imaged. First, the polarization calibration is performed utilizing three calibration objects, with the effectiveness verifiedby a measured spherical target and a dihedral target.Then, a low-sidelobe ISAR imaging method based on dual-dimension reconstruction (DDR) is proposed to obtain fine ISAR images of measured targets. Finally, the dataset of full-polarimetric ISAR images at various angular apertures is constructed. The dataset is publicly available at https://dx.doi.org/10.21227/aa29-0q14.