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Content Provider | IEEE Xplore Digital Library |
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Author | Fotopoulou, K. Flynn, B.W. |
Copyright Year | 2006 |
Description | Author affiliation: Univ. of Edinburgh, Edinburgh (Fotopoulou, K.; Flynn, B.W.) |
Abstract | Radio frequency inductive links are becoming extensively used for telemetry and wireless powering of implanted devices such as biomedical sensors and RFID implants. The design of RF coils for such links is often empirical and non-optimal. Based on loop antenna theory, this paper presents an analytical model for near-field magnetic coupling incorporating misalignment of the RF coil system. Formulae are derived for the magnetic field at the receiver coil when it is laterally and angularly misaligned from the transmitter. For the first time a near-field power transfer formula is suggested incorporating coil characteristics and misalignments. This novel power transfer function allows a comparison between different coil structures such short solenoids, with air or ferromagnetic core, and spirals with respect to the power delivered at the implant. It is also possible to define the maximum degree of misalignment permissible in a given application. This analysis allows a formal design procedure to be established in order to optimise wireless power transfer for a given application. |
Starting Page | 765 |
Ending Page | 768 |
File Size | 934585 |
Page Count | 4 |
File Format | |
ISBN | 1424403758 |
ISSN | 19300395 |
DOI | 10.1109/ICSENS.2007.355581 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2006-10-22 |
Publisher Place | South Korea |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Wireless sensor networks Radio frequency Coils Biosensors Implants Telemetry Radiofrequency identification Antenna theory Analytical models Couplings |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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