Range measurement using ultrasound FMCW signals

Low peak power frequency-modulated continuous wave (FMCW) radar is used in various fields, such as vehicle collision warning systems, airborne radio altimeters, and other applications. The authors proposed an ultrasound FMCW range measurement system based on the same principle as the FMCW radar. In the proposed system, the transmitter and receiver operate at very low voltage. This advantage suggests the possibility of designing a small and simple transmitter/receiver using low power ICs. Although pulsed ultrasound imaging is safe to patients, it's always a good idea to find a method that can use a minimum ultrasound power for diagnosis.