Title :
RF power harvesting for underground sensors
Author :
Jiang, Shan ; Georgakopoulos, Stavros V. ; Jonah, Olutola
Author_Institution :
Dept. of Electr. Eng., Florida Int. Univ., Miami, FL, USA
Abstract :
RF power harvesting for sensors buried inside soil is studied here. Our analytical formulations relay on the plane wave propagation models, and focus on calculating the transmission loss and propagation loss of RF waves penetrating soil at various incident angles. Specifically, analysis leads to the identification of an optimum frequency range within 10-100 MHz that is validated through antenna coupling full-wave EM simulations. Also, optimized rectenna is designed in order to harvest the ambient RF signals and charge the underground sensors.
Keywords :
VHF antennas; VHF radio propagation; energy harvesting; microwave detectors; rectennas; soil; underground communication; wireless sensor networks; RF power harvesting; RF waves; ambient RF signal harvesting; antenna coupling full-wave EM simulations; frequency 10 MHz to 100 MHz; optimized rectenna; plane wave propagation models; propagation loss; soil; transmission loss; wireless underground sensor networks; Atmospheric modeling; Energy harvesting; Propagation losses; Radio frequency; Sensors; Soil; Wireless sensor networks;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6348431
