Title :
Design and Safety Considerations of an Implantable Rectenna for Far-Field Wireless Power Transfer
Author :
Changrong Liu ; Yong-Xin Guo ; Hucheng Sun ; Shaoqiu Xiao
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
An implantable rectenna, which consists of a planar inverted-F antenna (PIFA) and a rectifier circuit, is proposed for far-field wireless power transfer. The PIFA has a folded ground plane to miniaturize its size. The performance of the wireless power link between the implanted antenna and an external antenna is examined. A method of adding a parasitic patch over the human body is used to enhance the wireless power link, thus to increase the received power level. Safety considerations of far-field RF powering are discussed. The RF-to-DC conversion circuit efficiency is optimized after the receiver power level of the implantable antenna is estimated based on the safety considerations. Finally, a rectifier circuit and an integrated rectenna solution are discussed.
Keywords :
biomedical communication; microstrip antennas; planar inverted-F antennas; prosthetics; rectennas; rectifiers; PIFA; RF-to-DC conversion circuit efficiency; design consideration; external antenna; far-field RF powering; far-field wireless power transfer; folded ground plane; implantable rectenna; implanted antenna; parasitic patch; planar inverted-F antenna; rectifier circuit; safety consideration; wireless power link; Receiving antennas; Rectennas; Safety; Skin; Transmitting antennas; Wireless communication; Far-field RF powering; implantable antenna; industrial; medical (ISM); planner inverted-F antenna (PIFA); rectifier; scientific; wireless power transfer;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2014.2352363
