Title :
A Dual Band Wireless Power and Data Telemetry for Retinal Prosthesis
Author :
Wang, Guoxing ; Liu, Wentai ; Sivaprakasam, Mohanasankar ; Zhou, Mingcui ; Weiland, James D. ; Humayun, Mark S.
Author_Institution :
Dept. of Electr. Eng., California Univ., Santa Cruz, CA
fDate :
Aug. 30 2006-Sept. 3 2006
Abstract :
Inductive coupling is commonly used for wireless power and data transfer in biomedical telemetry systems. The increasing demand on the performance of medical devices requires high data rate and high power efficiency at the same time. If only one radio frequency carrier is used, it is difficult to achieve both high data rate and high power efficiency due to the competing requirements on carrier frequency and system-Q of the power and data transmission. We propose a dual band telemetry system to implement power and data transmission using different frequencies by allocating lower frequency for power transmission and higher frequency for data transmission. However, the magnetic coupling between the power carrier and data carrier will affect the operation of both links. In this paper, this interference is analyzed and design equations are derived, which are used to design coils to maximize the data signal level received at the implant side. A prototype of dual band telemetry for a retinal prosthetic device has been built and experimental results show that both power and data can be transmitted and high data rate can be achieved without compromising the power transmission efficiency
Keywords :
biomedical telemetry; coils; electromagnetic interference; eye; prosthetic power supplies; biomedical telemetry systems; coil design; data transfer; data transmission; dual band wireless power telemetry system; inductive coupling; interference; magnetic coupling; power transmission efficiency; radio frequency carrier; retinal prosthesis; Biomedical telemetry; Couplings; Data communication; Dual band; Power transmission; Prosthetics; Radio frequency; Radio spectrum management; Retina; Signal design;
Conference_Titel :
Engineering in Medicine and Biology Society, 2006. EMBS '06. 28th Annual International Conference of the IEEE
Conference_Location :
New York, NY
Print_ISBN :
1-4244-0032-5
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2006.260470