Robert J. Dengler

TL;DR: A summary of the NASA Jet Propulsion Laboratory's 675 GHz imaging radar is presented, with an emphasis on several key design aspects that enable fast, reliable through-clothes imaging of person-borne concealed objects.

TL;DR: In this article, a high-resolution imaging radar operating at 576-605 GHz is capable of detecting weapons concealed by clothing at standoff ranges of 4-25 m. The present system can image a torso with <1 cm resolution at 4 m standoff in about five minutes.

TL;DR: In this article, a high-resolution imaging radar at 580 GHz was developed, which achieved centimeter-scale range resolution while utilizing fractional bandwidths of less than 3% by employing the frequency modulated continuous wave (FMCW) radar technique.

TL;DR: In this paper, a three-dimensional imaging radar operating at high frequency e.g., 670 GHz radar using low phase-noise synthesizers and a fast chirper to generate a frequency-modulated continuous-wave (FMCW) waveform, is disclosed that operates with a multiplexed beam to obtain range information simultaneously on multiple pixels of a target.

TL;DR: In this article, the spectral linewidth of three continuous-wave quantum cascade lasers operating at terahertz frequencies was measured by heterodyning the free-running quantum cascade laser with two far-infrared gas lasers.