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 proceedingConference contribution

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 languageEnglish
Title of host publication2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications, IMWS-BIO 2013 - Proceedings
PublisherIEEE Computer Society
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event2013 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 2013Dec 11 2013

Other

Other2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Tecbhnologies for Biomedical and Healthcare Applications, IMWS-BIO 2013
CountrySingapore
CitySingapore
Period12/9/1312/11/13

Fingerprint

Magnetic resonance imaging
Natural frequencies

Keywords

  • MRI
  • mutual coupling
  • NFC
  • RF Coils

ASJC Scopus subject areas

  • Biomedical Engineering
  • Health Informatics

Cite this

Mak, C. L., Lau, W. M., & 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. https://doi.org/10.1109/IMWS-BIO.2013.6756206

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 proceedingConference 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
Mak CL, Lau WM, Rowell C. 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. IEEE Computer Society. 2013. 6756206 https://doi.org/10.1109/IMWS-BIO.2013.6756206
Mak, Chi Lun ; Lau, Wan Ming ; Rowell, Corbett. / Electrically small RF coil arrays for medical & wireless power applications. 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.
@inproceedings{ed265926465a4696a433cead77d1b9f4,
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",
doi = "10.1109/IMWS-BIO.2013.6756206",
language = "English",
booktitle = "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",
address = "United States",

}

TY - GEN

T1 - Electrically small RF coil arrays for medical & wireless power applications

AU - Mak, Chi Lun

AU - Lau, Wan Ming

AU - Rowell, Corbett

PY - 2013

Y1 - 2013

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

UR - http://www.scopus.com/inward/record.url?scp=84897533894&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84897533894&partnerID=8YFLogxK

U2 - 10.1109/IMWS-BIO.2013.6756206

DO - 10.1109/IMWS-BIO.2013.6756206

M3 - Conference contribution

AN - SCOPUS:84897533894

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

ER -