Electrically small RF coil arrays for medical & wireless power applications

Chi Lun Mak; Wan Ming Lau; Corbett Rowell

doi:10.1109/IMWS-BIO.2013.6756206

Electrically small RF coil arrays for medical & wireless power applications

Chi Lun Mak, Wan Ming Lau, Corbett Rowell

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

This paper analyzes the effect of close proximity for coil arrays and measures the S₂₁ mutual coupling, resonant frequency, and quality factor (Q) of arrays with 2, 4, & 8 coils. It is demonstrated that for vertically separated coils, the mutual coupling effect decays asymptotically as a function of separation distance; whereas for horizontally separated coils, there are two mutual coupling minima with one minima occurring for overlapping coils and the second minima similar to the vertically separated coils. Results from this study can be used to optimize electrically small RF coil arrays used in low-field MRI, NFC, and wireless power transfer.

Original language	English
Title of host publication	2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, IMWS-BIO 2013 - Proceedings
Publisher	IEEE Computer Society
DOIs	https://doi.org/10.1109/IMWS-BIO.2013.6756206
Publication status	Published - 2013
Externally published	Yes
Event	2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Tecbhnologies for Biomedical and Healthcare Applications, IMWS-BIO 2013 - Singapore, Singapore Duration: Dec 9 2013 → Dec 11 2013

Other

Other	2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Tecbhnologies for Biomedical and Healthcare Applications, IMWS-BIO 2013
Country	Singapore
City	Singapore
Period	12/9/13 → 12/11/13

Keywords

MRI
mutual coupling
NFC
RF Coils

ASJC Scopus subject areas

Biomedical Engineering
Health Informatics

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Electrically small RF coil arrays for medical & wireless power applications. / Mak, Chi Lun; Lau, Wan Ming; Rowell, Corbett.

2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, IMWS-BIO 2013 - Proceedings. IEEE Computer Society, 2013. 6756206.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Mak, CL, Lau, WM & Rowell, C 2013, Electrically small RF coil arrays for medical & wireless power applications. in 2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, IMWS-BIO 2013 - Proceedings., 6756206, IEEE Computer Society, 2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Tecbhnologies for Biomedical and Healthcare Applications, IMWS-BIO 2013, Singapore, Singapore, 12/9/13. https://doi.org/10.1109/IMWS-BIO.2013.6756206

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title = "Electrically small RF coil arrays for medical & wireless power applications",

abstract = "This paper analyzes the effect of close proximity for coil arrays and measures the S21 mutual coupling, resonant frequency, and quality factor (Q) of arrays with 2, 4, & 8 coils. It is demonstrated that for vertically separated coils, the mutual coupling effect decays asymptotically as a function of separation distance; whereas for horizontally separated coils, there are two mutual coupling minima with one minima occurring for overlapping coils and the second minima similar to the vertically separated coils. Results from this study can be used to optimize electrically small RF coil arrays used in low-field MRI, NFC, and wireless power transfer.",

keywords = "MRI, mutual coupling, NFC, RF Coils",

author = "Mak, {Chi Lun} and Lau, {Wan Ming} and Corbett Rowell",

year = "2013",

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booktitle = "2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, IMWS-BIO 2013 - Proceedings",

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AU - Lau, Wan Ming

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N2 - This paper analyzes the effect of close proximity for coil arrays and measures the S21 mutual coupling, resonant frequency, and quality factor (Q) of arrays with 2, 4, & 8 coils. It is demonstrated that for vertically separated coils, the mutual coupling effect decays asymptotically as a function of separation distance; whereas for horizontally separated coils, there are two mutual coupling minima with one minima occurring for overlapping coils and the second minima similar to the vertically separated coils. Results from this study can be used to optimize electrically small RF coil arrays used in low-field MRI, NFC, and wireless power transfer.

AB - This paper analyzes the effect of close proximity for coil arrays and measures the S21 mutual coupling, resonant frequency, and quality factor (Q) of arrays with 2, 4, & 8 coils. It is demonstrated that for vertically separated coils, the mutual coupling effect decays asymptotically as a function of separation distance; whereas for horizontally separated coils, there are two mutual coupling minima with one minima occurring for overlapping coils and the second minima similar to the vertically separated coils. Results from this study can be used to optimize electrically small RF coil arrays used in low-field MRI, NFC, and wireless power transfer.

KW - MRI

KW - mutual coupling

KW - NFC

KW - RF Coils

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DO - 10.1109/IMWS-BIO.2013.6756206

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BT - 2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, IMWS-BIO 2013 - Proceedings

PB - IEEE Computer Society

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Y2 - 9 December 2013 through 11 December 2013

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Electrically small RF coil arrays for medical & wireless power applications

Abstract

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Keywords

ASJC Scopus subject areas

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