Fully-analog array signal processor using 3D aperture engineering

Researchers developed a fully-analog array signal processor (FASP) using 3D aperture engineering with cascaded metasurface layers that achieves N times higher angular resolution than the Rayleigh diffraction limit. The system can perform super-resolution direction-of-arrival estimation and multi-channel source separation, demonstrating 20 dB radar jamming suppression and 13.5x communication capacity enhancement at 36-41 GHz frequencies.