S19-154 A System for Remote Parametric Detection, Localization, and Identification of Passive Tags using Radio Frequency and Ultrasound Waves Researchers in the Arbabian Lab have developed a system that uses a combination of radio frequency (RF) electromagnetic and ultrasound (US) waves to detect, localize, and identify multiple battery-free tags. Angad Rekhi Mohammad Arbabian Chun-Ming So Albert Gural