3D SAR Imaging enabled by Terahertz Time-Domain Spectroscopy

To achieve higher resolution, radar systems are penetrating ever higher frequency ranges. Recently, the terahertz frequency range has become the focus of researchers because it offers a high frequency bandwidth. Here, we present a synthetic aperture radar (SAR) approach enabled by terahertz time-domain spectroscopy (THz-TDS) for 2D and 3D imaging. Due to the high bandwidth of more than 2 THz, a resolution finer than 500 mu m can be realized.