Tone-ranging-inspired architecture for short-range radars: Theory and simulations

Short-range radars are currently gaining much attention from the RF/microwave community. In particular, frequency-modulated continuous-wave (FMCW) radars are usually exploited in a plurality of applications. However, to measure the absolute range of targets, they need a large transmitted bandwidth, which is an ever-crowded resource. Here, for the first time, a bandwidth-limited architecture based on the transmission of two tones closely located in the spectrum is proposed for short-range radars. Theoretical and simulation analyses confirm that this novel radar system permits unambiguous measurement of the range of multiple moving targets.