High Precision Measurements of the Permittivity of Water in the Microwave Range

1990 ◽  
Vol 45 (5) ◽  
pp. 677-686 ◽  
Author(s):  
H. J. Steinhoff ◽  
A. Redhardt ◽  
K. Lieutenant ◽  
W. Chrost ◽  
G. Hess ◽  
...  
Keyword(s):  
Standard Method ◽  
Complex Permittivity ◽  
Systematic Errors ◽  
Precision Measurements ◽  
Limiting Factors ◽  
Microwave Range ◽  
Debye Function ◽  
High Loss ◽  
Relaxation Parameters

Abstract A practical version of a homodyne method for measuring the complex permittivity of high loss liquids at 3 and 9 GHz is described. The systematic errors are discussed in detail, because the homodyne method seems to be suitable as a simple standard method for precise measurements. The results of measurements on water in the temperature range 6 °C-45 °C are presented. The determination of all five parameters of the Debye function is possible. Finally, accuracy limiting factors for the determination of the relaxation parameters are discussed in detail

Determination of the Frequency Dependence of Complex Permittivity in the Pseudo-Microwave Range by an Advanced Perturbation Method

1994 ◽  
Vol 33 (Part 1, No. 9B) ◽  
pp. 5510-5513 ◽  
Author(s):  
Takeshi Takahashi ◽  
Yasushi Iijima ◽  
Makoto Kobayashi ◽  
Taro Miura
Keyword(s):  
Perturbation Method ◽  
Frequency Dependence ◽  
Complex Permittivity ◽  
Microwave Range

Determination of the complex permittivity of disperse materials in the microwave range

1981 ◽  
Vol 24 (1) ◽  
pp. 29-33
Author(s):  
V. V. Zagoskin ◽  
E. A. Zamotrinskaya ◽  
V. M. Nesterov ◽  
T. G. Mikhailova
Keyword(s):  
Complex Permittivity ◽  
Microwave Range

scholarly journals Determination of dielectric permeability of substances by electromagnetic waveguide method

2020 ◽  
Vol 28 (1) ◽  
pp. 85-90
Author(s):  
Vikt. V. Ovsyanikov ◽  
E. R. Beznosova ◽  
L. Z. Tsypko ◽  
L. I. Filins’kyy ◽  
Vl. V. Ovsyanikov
Keyword(s):  
Dielectric Constant ◽  
Reflection Coefficient ◽  
Complex Permittivity ◽  
Dielectric Permeability ◽  
Microwave Range ◽  
Electromagnetic Waveguide ◽  
The Relationship ◽  
Waveguide Method

A method for determining the complex permittivity of substances by the electromagnetic (EM) waveguide method in the microwave range using electrodynamics and the theory of multilayer dielectric structures is considered. The expression for the complex reflection coefficient of an EM wave in a waveguide with a substance sample is studied. Calculations of the dielectric constant of substances are carried out by analytical and numerical methods using computers. To obtain the desired complex permittivity of a substance, we use the relationship between the expression for the reflection coefficient modulus and the value of the standing wave coefficient over voltage measured in advance in the frequency range. The method is suitable for automation and application in enterprises producing and using fuels, construction and agricultural products. From the found value of the dielectric constant, the quality of substances can be determined. For example, the results of determining the dielectric constant several coals and solid-state foam are given.

Determination of the Complex Permittivity of High Loss Liquids with a Novel Reentrant Cavity

2018 ◽  
Author(s):  
David Marques-Villarroya ◽  
Felipe Pcnaranda-Foix ◽  
Antoni J. Canos ◽  
Beatriz Garcia-Banos ◽  
Jose M. Catala-Civera
Keyword(s):  
Complex Permittivity ◽  
High Loss

Statistics and parallaxes

1978 ◽  
Vol 48 ◽  
pp. 7-29
Author(s):  
T. E. Lutz
Keyword(s):  
Experimental Design ◽  
Statistical Methods ◽  
Review Paper ◽  
Systematic Errors ◽  
Past Experience ◽  
Random Errors ◽  
Trigonometric Parallaxes ◽  
Systematic And Random Errors

This review paper deals with the use of statistical methods to evaluate systematic and random errors associated with trigonometric parallaxes. First, systematic errors which arise when using trigonometric parallaxes to calibrate luminosity systems are discussed. Next, determination of the external errors of parallax measurement are reviewed. Observatory corrections are discussed. Schilt’s point, that as the causes of these systematic differences between observatories are not known the computed corrections can not be applied appropriately, is emphasized. However, modern parallax work is sufficiently accurate that it is necessary to determine observatory corrections if full use is to be made of the potential precision of the data. To this end, it is suggested that a prior experimental design is required. Past experience has shown that accidental overlap of observing programs will not suffice to determine observatory corrections which are meaningful.

Broadband Measurement of the Complex Permittivity of Ferroelectric Ceramicsin the Microwave Range

2018 ◽  
Vol 7 (4) ◽  
pp. 48-55
Author(s):  
A.V. Donchenko ◽  
◽  
V.V. Zemlyakov ◽  
M.A. Marahovskiy ◽  
A.E. Panich ◽  
...  
Keyword(s):  
Complex Permittivity ◽  
Microwave Range
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