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

Volume

62

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

5798

Lastpage

5806

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;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2014.2352363

Filename

6883193