Study on the acoustic impedance matching of human tissue for power transmitting/charging system of implanted biochip

Author

Hu, Yuh-Chung ; Liao, Po-Lin ; Shih, Wen-Pin ; Wang, Xuan-Yu ; Chang, Pei-Zen

Author_Institution

Dept. of Mech. & Electro-Mech. Eng., Nat. ILan Univ., Ilan, Taiwan

fYear

2009

fDate

18-21 Oct. 2009

Firstpage

201

Lastpage

205

Abstract

This paper presents an acoustic impedance matching model for the power transmission in human tissue. Utilizing the piezoelectric effect, the acoustic wave provides a feasible way to wirelessly charge the battery of the implanted biochip. A modified matching method from Desilets microwave transmission theory is derived to match the acoustic impedance between the piezo-transmitter/receiver and the human tissue. The lead-zirconate-titanate (PZT, 39.71MRayl) is used to be the material of transmitter/receiver. Based on the results of the modified matching model, the double impedance matching layers are constructed by the aluminum alloy 6061T6 with impedance 17.1MRayl and polymethylmethacrylate (PMMA) with 3.33MRayl. The maximum power gain is 5.55 dB in simulation and 3.13 dB in experiment result.

Keywords

acoustic impedance; aluminium alloys; bioelectric phenomena; biological tissues; lab-on-a-chip; lead compounds; piezoelectric transducers; piezoelectricity; prosthetic power supplies; receivers; transmitters; AlJkJk; Desilets microwave transmission theory; PZT; acoustic impedance; acoustic impedance matching; acoustic wave; aluminum alloy 6061T6; human tissue; implanted biochip; lead-zirconate-titanate; modified matching method; piezoelectric effect; piezoreceiver; piezotransmitter; polymethylmethacrylate; power gain; power transmission; power transmitting-charging system; wireless charging; Acoustics; Impedance; Lead; Receivers; Stress; Transmitters; Acoustic impedance matching; Piezoelectric transducers; Power transmission;

fLanguage

English

Publisher

ieee

Conference_Titel

Nano/Molecular Medicine and Engineering (NANOMED), 2009 IEEE International Conference on

Conference_Location

Tainan

Print_ISBN

978-1-4244-5528-7

Type

conf

DOI

10.1109/NANOMED.2009.5559087

Filename

5559087