Radar-Based Input Controls

This document describes systems and techniques directed at radar-based input controls for electronic devices. In aspects, an electronic device includes a radar input control system that can perform presence detection, as well as distinguish between touch input, gesture input, and/or potential docking devices. In implementations, the electronic device includes a plurality of radar reception antennas and at least one transmit channel that feeds a plurality of radar transmission antennas. One or more radar reception antennas of the plurality of radar reception antennas may correspond to a discrete input location on a surface of the electronic device. In this way, the electronic device can be implemented without mechanical switches or a touchscreen interface and still receive user input.