A multiband antenna associating wireless monitoring and nonleaky wireless power transfer system for biomedical implants

Das, R. and Yoo, H. (2017) A multiband antenna associating wireless monitoring and nonleaky wireless power transfer system for biomedical implants. IEEE Transactions on Microwave Theory and Techniques, 65(7), pp. 2485-2495. (doi: 10.1109/TMTT.2017.2647945)

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This paper presents a multiband conformal antenna for implantable as well as ingestible devices. The proposed antenna has the following three bands: medical implanted communication service (MICS: 402-405 MHz), the midfield band (1.45-1.6 GHz), and the industrial, scientific, and medical band (ISM: 2.4-2.45 GHz) for telemetry or wireless monitoring, wireless power transfer (WPT), and power conservation, respectively. A T-shaped ground slot is used to tune the antenna, and this antenna is wrapped inside a printed 3-D capsule prototype to demonstrate its applicability in different biomedical devices. Initially, the performance of the proposed antenna was measured in an American Society for Testing and Materials phantom containing a porcine heart in the MICS band for an implantable case. Furthermore, to stretch the scope of the suggested antenna to ingestible devices, the antenna performance was simulated and measured using a minced pork muscle in the ISM band. A modified version of the midfield power transfer method was incorporated to replicate the idea of WPT within the implantable 3-D printed capsule. Moreover, a near-field plate (NFP) was employed to control the leakage of power from the WPT transmitter. From the simulation and measurements, we found that use of a ground slot in the implantable antenna can improve antenna performance and can also reduce the specific absorption rate. Furthermore, by including the NFP with the midfield WPT transmitter system, unidirectional wireless power can be obtained and WPT efficiency can be increased.

Item Type:Articles
Additional Information:This work was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology under Grant 2016R1D1A1A09918140.
Glasgow Author(s) Enlighten ID:Das, Dr Rupam
Authors: Das, R., and Yoo, H.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Transactions on Microwave Theory and Techniques
Publisher:Institute of Electrical and Electronics Engineers
ISSN (Online):0018-9480

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