TY - JOUR
T1 - Noncontact measurement of complex permittivity based on the principle of mid-range wireless power transfer
AU - Shen, Fazhong
AU - Salamin, Yannick
AU - Dong, Jing
AU - Sun, Yongzhi
AU - Huangfu, Jiangtao
AU - Li, Changzhi
AU - Ran, Lixin
PY - 2014/3
Y1 - 2014/3
N2 - The measurement of complex permittivity of materials is of significant importance in scientific research and industrial applications. In this paper, we introduce the strongly coupled magnetic resonance previously used in high-efficiency midrange wireless power transfer to the noncontact measurement of the complex permittivity of materials. Theoretical analysis, full-wave simulation, and experimental measurements will show that the introduced high-Q-factor resonance can be used to effectively improve both the measurement sensitivity and the impedance matching to the instrument, avoiding the major weaknesses of the traditional magnetic induction method. The measurement setup can be easily calibrated for both solid and liquid materials and can provide the flexibility in noncontact measurement at a variable distance. We expect a wide range of applications to emerge from this novel approach.
AB - The measurement of complex permittivity of materials is of significant importance in scientific research and industrial applications. In this paper, we introduce the strongly coupled magnetic resonance previously used in high-efficiency midrange wireless power transfer to the noncontact measurement of the complex permittivity of materials. Theoretical analysis, full-wave simulation, and experimental measurements will show that the introduced high-Q-factor resonance can be used to effectively improve both the measurement sensitivity and the impedance matching to the instrument, avoiding the major weaknesses of the traditional magnetic induction method. The measurement setup can be easily calibrated for both solid and liquid materials and can provide the flexibility in noncontact measurement at a variable distance. We expect a wide range of applications to emerge from this novel approach.
KW - Complex permittivity
KW - coupled magnetic resonance
KW - noncontact measurement
KW - wireless power transfer (WPT)
UR - http://www.scopus.com/inward/record.url?scp=84898596313&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2014.2302739
DO - 10.1109/TMTT.2014.2302739
M3 - Article
AN - SCOPUS:84898596313
SN - 0018-9480
VL - 62
SP - 669
EP - 678
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
IS - 3
M1 - 6730721
ER -