Accurate Determinatuon of Microwave Conductivity by Means of Cavity Coupling Coefficient Measurement

1975 ◽  
Vol 14 (6) ◽  
pp. 909-910 ◽  
Author(s):  
Kenzo Watanabe ◽  
Mitsuaki Ashiki ◽  
Shizuo Mizushina ◽  
Iwao Takao
Keyword(s):  
Coupling Coefficient ◽  
Microwave Conductivity ◽  
Cavity Coupling ◽  
Coefficient Measurement

scholarly journals Coupling Coefficient Measurement Method with Simple Procedures Using a Two-Port Network Analyzer for a Multi-Coil WPT System

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3950
Author(s):  
Seon-Jae Jeon ◽  
Dong-Wook Seo
Keyword(s):  
Coupling Coefficient ◽  
Measurement Method ◽  
Simple Procedure ◽  
Measurement Procedure ◽  
Network Analyzer ◽  
Wireless Power ◽  
S Parameter ◽  
Coefficient Measurement ◽  
Simple Measurement ◽  
Definition Of

In this paper, we propose a measurement method with a simple procedure based on the definition of the impedance parameter using a two-port network analyzer. The main advantage of the proposed measurement method is that there is no limit on the number of measuring coils, and the method has a simple measurement procedure. To verify the proposed method, we measured the coupling coefficient among three coils with respect to the distance between the two farthest coils at 6.78 and 13.56 MHz, which are frequencies most common for a wireless power transfer (WPT) system in high-frequency band. As a result, the proposed method showed good agreement with results of the conventional S-parameter measurement methods.

The method of determining the metrological performance of unit reference standards of reflection coefficient in waveguides at millimeter waves

2020 ◽  
pp. 59-63
Author(s):  
A.S. Bondarenko ◽  
A.S. Borovkov ◽  
I.M. Malay ◽  
V.A. Semyonov
Keyword(s):  
Reflection Coefficient ◽  
Millimeter Waves ◽  
Primary Standard ◽  
Reference Standards ◽  
Measurement Scale ◽  
Current State ◽  
Coefficient Measurement ◽  
Mathematical Equations ◽  
Electrodynamic Modeling ◽  
Metrological Performance

The analysis of the current state of the reflection coefficient measurements in waveguides at millimeter waves is carried out. An approach for solving the problem of reproducing the reflection coefficient measurement scale is proposed. Mathematical equations, which are the basis of the reflection coefficient measurement equation are obtained. The method of determining the metrological performance of reflection coefficient unit’s reference standards is developed. The results of electrodynamic modeling and analytical calculations by the developed method are compared. It is shown that this method can be used for reproducing the reflection coefficient unit in the development of the State primary standard.

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