Kuo H.-YTakabayashi NLu S.-YMitani TYING-CHIH LIAOLiao Y.-T.2022-11-162022-11-162021https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124891039&doi=10.1109%2fIFEEC53238.2021.9661764&partnerID=40&md5=a4d4c0adf93e90b7547c494dbf50ecdchttps://scholars.lib.ntu.edu.tw/handle/123456789/625134This paper presents an unmanned aerial vehicle (UAV)-assisted wirelessly powered temperature sensing system. The system includes a custom wireless temperature readout IC with envelop-injection-locking clock generation and a size-wise power transmitter for extending the operation time of the UAV. A wirelessly powered temperature readout silicon chip is designed to measure the temperature of NiO sensor. The chip was fabricated using 0.18-$\mu$ m CMOS technology. The measured rectifier sensitivity is -17 dBm. A read range of 2.7 m is demonstrated for powering a 2.2 $\mu$ W temperature-sensing chip with an effective isotropic radiation power of 22 dBm at 929 MHz. The low-power-temperature sensing IC,lightweight power transmitter,and microstrip antenna enable batteryless environmental sensing using a UAV. © 2021 IEEE.temperature sensor; unmanned aerial vehicle; wireless powering[SDGs]SDG7Microstrip antennas; Nickel oxide; Transmitters; Unmanned aerial vehicles (UAV); Clock generation; Environmental Monitoring; Injection-locking; Operation time; Power transmitters; Readout IC; Sensing systems; Temperature readout; Temperature sensing; Wireless powering; Temperature sensorsconference paper10.1109/IFEEC53238.2021.96617642-s2.0-85124891039