Title :
A wirelessly-powered passive RF CMOS transponder with dynamic energy storage and sensitivity enhancement
Author :
Safarian, Zahra ; Hashemi, Hossein
Author_Institution :
Electr. Eng.-Electrophys., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
A scheme for a wirelessly-powered passive sensor is presented in which the extra received power beyond the sensitivity level is stored and later used to enhance the sensitivity of the wireless sensor. A prototype chip has been designed and fabricated in a 0.13 μm CMOS technology. The measurement results show that the aforementioned energy storage mechanism improves the sensitivity of the wireless sensor from -19.5 dBm to -29 dBm at 900 MHz and from -15.4 dBm to -26.5 dBm at 2.4 GHz.
Keywords :
CMOS integrated circuits; UHF integrated circuits; transponders; wireless sensor networks; dynamic energy storage; frequency 2.4 GHz; frequency 900 MHz; passive RF CMOS transponder; sensitivity enhancement; size 0.13 mum; wireless sensor; wirelessly-powered passive sensor; Energy storage; Modulation; Radiofrequency identification; Sensitivity; Transponders; Wireless communication; Wireless sensor networks; CMOS; Energy harvesting; Passive transponder;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2011 IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-8293-1
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2011.5940632
