Tracking Optimal Efficiency of Magnetic Resonance Wireless Power Transfer System for Biomedical Capsule Endoscopy
Cited 0 times inCited 0 times in
- Tracking Optimal Efficiency of Magnetic Resonance Wireless Power Transfer System for Biomedical Capsule Endoscopy
- Na, Kyungmin; Jang, Heedon; Ma, Hyunggun; Bien, Franklin
- Issue Date
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.63, no.1, pp.295 - 304
- This paper presents a new method to track the optimal efficiency of a magnetic resonance (MR)-wireless power transfer (WPT) system for biomedical capsule endoscopy. Recently, capsule endoscopy technology has been developed and emerged as an alternative to small bowel endoscopy, gastroscopy, and colonoscopy, all of which cause discomfort to patients because of their relatively large-diameter and flexible cables. However, commercialized capsule endoscopy still suffers from limited battery capacity. This paper presents a theory for tracking the optimal efficiency of an MR-WPT system, along with its experimental verification. An MR-WPT system with a 9-mm-diameter receiver is implemented, which is small enough to fit in the current capsule endoscope. The proposed system improves the efficiency despite variations in the distance, angle, and axial misalignment, with maximum increases of 2.45, 4.69, and 1.48 dB, respectively. Penetrative transfer through biological tissue is demonstrated with a low degradation in efficiency of 0.390 dB. The proposed system was found to have a very low specific absorption rate of 1.74 W/kg, which demonstrated that it is safe to use in the human body.
- Appears in Collections:
- EE_Journal Papers
- Files in This Item:
- There are no files associated with this item.
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.