TY - GEN
T1 - An 884MHz, -41.8dBm Input Power Sensitivity, 570-Stage CMOS RF-DC Rectifier With Ground Shielded Input Coupling Capacitors
AU - Park, Yoomi
AU - Byun, Sangjin
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - This paper presents an 884MHz CMOS RF-DC rectifier for ambient RF energy harvesting. Generally, the input power sensitivity increases as the RF-DC rectifier contains more number of rectifier cells. However, integrating a large number of rectifier cells normally reduces the passive amplification gain of the matching network and thus may not bring the desired results. In this paper, the proposed RF-DC rectifier adopts metal ground shield plane beneath the input coupling capacitors thereby incorporating as many as 570 rectifier cells without lowering the passive amplification gain. By doing so, the 884MHz, 570-stage RF-DC rectifier implemented in a 28nm 1P11M CMOS process achieves the measured input power sensitivity of -41.8dBm at 1V output DC voltage. The measured recharging time from 0.88V to 1.0V is 11.1 seconds when the storage capacitor is 1nF. Also, the over-the-air functionality with ambient LTE downlink signals has been demonstrated in a real environment.
AB - This paper presents an 884MHz CMOS RF-DC rectifier for ambient RF energy harvesting. Generally, the input power sensitivity increases as the RF-DC rectifier contains more number of rectifier cells. However, integrating a large number of rectifier cells normally reduces the passive amplification gain of the matching network and thus may not bring the desired results. In this paper, the proposed RF-DC rectifier adopts metal ground shield plane beneath the input coupling capacitors thereby incorporating as many as 570 rectifier cells without lowering the passive amplification gain. By doing so, the 884MHz, 570-stage RF-DC rectifier implemented in a 28nm 1P11M CMOS process achieves the measured input power sensitivity of -41.8dBm at 1V output DC voltage. The measured recharging time from 0.88V to 1.0V is 11.1 seconds when the storage capacitor is 1nF. Also, the over-the-air functionality with ambient LTE downlink signals has been demonstrated in a real environment.
KW - ground shielded capacitor
KW - input power sensitivity
KW - RF energy harvester
KW - RF-DC rectifier
KW - substrate resistance
UR - http://www.scopus.com/inward/record.url?scp=85198540006&partnerID=8YFLogxK
U2 - 10.1109/ISCAS58744.2024.10558172
DO - 10.1109/ISCAS58744.2024.10558172
M3 - Conference contribution
AN - SCOPUS:85198540006
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
BT - ISCAS 2024 - IEEE International Symposium on Circuits and Systems
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2024 IEEE International Symposium on Circuits and Systems, ISCAS 2024
Y2 - 19 May 2024 through 22 May 2024
ER -