Keywords: Rangefinder, 24GHz.

Abstract: Pulsed harmonic transmitter and receiver employing harmonic techniques to leverage low-cost, ordinary surface mount technology to high microwave frequencies (24GHz) where tight beamforming with a small antenna makes reliable, high-accuracy pulse-echo radar systems possible. The harmonic techniques overcome four major problems with non-harmonic approaches: 1) expensive, precision assembly, 2) high local oscillator noise, 3) sluggish oscillator startup, and 4) spurious local oscillator injection locking on external RF.

Applications include automotive backup and collision warning radars, precision radar and laser rangefinders for fluid level sensing and robotics, precision radiolocation, wideband communications, and time-resolved holographic imaging.