A 94GHz mm-wave to baseband pulsed-radar for imaging and gesture recognition

An integrated phase-coherent and pixel-scalable pulsed-radar transceiver with on-chip tapered loop antennas generates programmable pulses down to 36ps using an integrated 94GHz carrier, frequency synthesized and locked to an external reference. A DLL controls the TX pulse position with 2.28ps resolution, which allows the chip to function as a unit element in a timed-array. The receiver also features a >1.5THz GBW DA as the front-end amplifier, quadrature mixers, and a 26GHz quadrature baseband. Phase coherency allows for ∼375µm single-target position resolution by interferometry.