Sensors 2014, 14(7), 11522-11541; doi:10.3390/s140711522
Article

Analysis and Optimization of Spiral Circular Inductive Coupling Link for Bio-Implanted Applications on Air and within Human Tissue

1,2,* email, 1email, 1email and 1email
Received: 1 May 2014; in revised form: 19 June 2014 / Accepted: 26 June 2014 / Published: 30 June 2014
(This article belongs to the Special Issue Implantable Sensors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The use of wireless communication using inductive links to transfer data and power to implantable microsystems to stimulate and monitor nerves and muscles is increasing. This paper deals with the development of the theoretical analysis and optimization of an inductive link based on coupling and on spiral circular coil geometry. The coil dimensions offer 22 mm of mutual distance in air. However, at 6 mm of distance, the coils offer a power transmission efficiency of 80% in the optimum case and 73% in the worst case via low input impedance, whereas, transmission efficiency is 45% and 32%, respectively, via high input impedance. The simulations were performed in air and with two types of simulated human biological tissues such as dry and wet-skin using a depth of 6 mm. The performance results expound that the combined magnitude of the electric field components surrounding the external coil is approximately 98% of that in air, and for an internal coil, it is approximately 50%, respectively. It can be seen that the gain surrounding coils is almost constant and confirms the omnidirectional pattern associated with such loop antennas which reduces the effect of non-alignment between the two coils. The results also show that the specific absorption rate (SAR) and power loss within the tissue are lower than that of the standard level. Thus, the tissue will not be damaged anymore.
Keywords: bio-medical implanted devices; ISM band; inductive coupling link spiral coils; SAR effect
PDF Full-text Download PDF Full-Text [1393 KB, uploaded 30 June 2014 14:03 CEST]

Export to BibTeX |
EndNote


MDPI and ACS Style

Mutashar, S.; Hannan, M.A.; Samad, S.A.; Hussain, A. Analysis and Optimization of Spiral Circular Inductive Coupling Link for Bio-Implanted Applications on Air and within Human Tissue. Sensors 2014, 14, 11522-11541.

AMA Style

Mutashar S, Hannan MA, Samad SA, Hussain A. Analysis and Optimization of Spiral Circular Inductive Coupling Link for Bio-Implanted Applications on Air and within Human Tissue. Sensors. 2014; 14(7):11522-11541.

Chicago/Turabian Style

Mutashar, Saad; Hannan, Mahammad A.; Samad, Salina A.; Hussain, Aini. 2014. "Analysis and Optimization of Spiral Circular Inductive Coupling Link for Bio-Implanted Applications on Air and within Human Tissue." Sensors 14, no. 7: 11522-11541.


Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert