Wireless Power Transmission to a Buried Sensor in Concrete

• Published in: IEEE sensors journal Vol. 7; no. 12; pp. 1573 - 1577
• Main Authors: Shams, K.M.Z., Ali, M.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-12-2007; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna measurements; Antennas; Batteries; Concrete; Concretes; Conversion; Direct current; Ground penetrating radar; Microstrip antennas; Monitoring; Patch antennas; Power transmission; rectenna; Rectennas; Sensors; Wet concrete; Wireless power transmission; wireless sensor; Wireless sensor networks
• ISSN: 1530-437X; 1558-1748
• DOI: 10.1109/JSEN.2007.908230

The feasibility of sending wireless power to a buried sensor antenna within concrete was studied. A receive patch rectenna with 75.8% conversion efficiency was designed for operation at 5.7 GHz. The received DC power at the rectenna was measured within dry and wet concrete samples with various cover thicknesses and air-gaps. For the rectenna buried within 30 mm of the concrete, the received DC power was 10.37 mW, which was about 70% of the received DC power in free-space.