Title :
A miniaturized spiral antenna for energy harvesting of implantable medical devices
Author :
Qingyun Ma ; Ray, Laxmi ; Haider, Mohammad Rafiqul
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alabama at Birmingham, Birmingham, AL, USA
Abstract :
In this paper, a wireless power transfer system for implantable medical devices using a miniaturized 3 mm diameter single arm circular spiral antenna is presented. The transmission characteristics, S21 between the transmitting and receiving antennas with air and tissue as a medium between antennas are analyzed and measured. The receiver antenna receives almost 2 mW average power with power transfer efficiency of 53%. The power transfer efficiency could still reach to 4% with 274 μW average received power, with placement of 1.5 cm tissue and 1 cm air in between two antennas. With one PN diode rectifier, the total DC power from the receiver side is 489 nW.
Keywords :
energy harvesting; geometry; prosthetic power supplies; radiofrequency power transmission; receiving antennas; spiral antennas; transmitting antennas; PN diode rectifier; energy harvesting; implantable medical devices; miniaturized spiral antenna; power transfer efficiency; receiving antennas; single arm circular spiral antenna; transmitting antennas; wireless power transfer system; Antenna feeds; Receiving antennas; Spirals; Transmitting antennas; Wireless communication; Wireless power transfer; biomedical tissue; implantable; power transfer efficiency; spiral antenna;
Conference_Titel :
Electrical and Computer Engineering (ICECE), 2014 International Conference on
Conference_Location :
Dhaka
Print_ISBN :
978-1-4799-4167-4
DOI :
10.1109/ICECE.2014.7026880
