Coaxial Line Reflection Methods for Measuring Dielectric Properties of Biological Substances at Radio and Microwave Frequencies-A Review

1980 ◽  
Vol 29 (3) ◽  
pp. 176-183 ◽  
Author(s):  
Maria A. Stuchly ◽  
Stanislaw S. Stuchly
Keyword(s):  
Dielectric Properties ◽  
Coaxial Line ◽  
Microwave Frequencies

Dielectric Properties of Lead Alkaline-Earth Zirconate at Microwave Frequencies

1991 ◽  
Vol 30 (Part 1, No. 9B) ◽  
pp. 2343-2346 ◽  
Author(s):  
Junichi Kato ◽  
Hiroshi Kagata ◽  
Keiji Nishimoto
Keyword(s):  
Dielectric Properties ◽  
Alkaline Earth ◽  
Microwave Frequencies

Dielectric Properties of Pb-Based Perovskite Substituted by Ti for B-site at Microwave Frequencies

1993 ◽  
Vol 32 (Part 1, No. 9B) ◽  
pp. 4332-4334 ◽  
Author(s):  
Hiroshi Kagata ◽  
Junichi Kato ◽  
Keiji Nishimoto ◽  
Tatsuya Inoue
Keyword(s):  
Dielectric Properties ◽  
Microwave Frequencies

scholarly journals Correlation between Reflection Coefficient, Dielectric Properties and Brix Level of Malaysian Oranges at Microwave Frequencies

2018 ◽  
Vol 10 (3) ◽  
pp. 853 ◽  
Author(s):  
Rafidah Rosman ◽  
Mohamad Ngasri Dimon ◽  
You Kok Yeow
Keyword(s):  
Dielectric Properties ◽  
Reflection Coefficient ◽  
Experimental Measurement ◽  
Operating Frequency ◽  
Test Bed ◽  
Microwave Frequencies ◽  
Microwave Technique ◽  
Set Up ◽  
The Relationship

This paper presents sweetness degree (°Brix) prediction of the Malaysian oranges using microwave technique. Experimental measurement using monopole sensor and reflectometer was done in order to correlate the relationship between measured reflection coefficient, <em>S</em><sub>11</sub>  of the orange and its sweetness level. Up to fifty orange samples were freshly plucked from local grower’s farm and tested. The unique design of the monopole sensor’s holder is made of nylon. The experiment test bed was set up based on the standard dimension of monopole sensor available in the market. The operating frequency is focusing on 2.2 GHz as it shows significant sensitivity for determining Malaysian local oranges sweetness level.

Technique for Measuring the Dielectric Properties of Minerals as a Function of Temperature and Density at Microwave Heating Frequencies

1990 ◽  
Vol 189 ◽  
Author(s):  
Johanna B. Salsman
Keyword(s):  
Dielectric Properties ◽  
Microwave Heating ◽  
Research Effort ◽  
Coaxial Line ◽  
Dielectric Constants ◽  
Dielectric Constant And Loss ◽  
Electrical Conductivities ◽  
Natural Density ◽  
The Common ◽  
Method Of Measurement

ABSTRACTAs part of the research effort on investigating the effects of microwave energy absorption on the chemical and physical properties of minerals and ores, the Bureau of Mines, Tuscaloosa Research Center has developed a technique of measuring the dielectric constant and loss tangent of minerals at the common microwave heating frequencies. The objective was to establish a reliable data base to aid in predicting the effects of microwave heating on minerals.In this phase of microwave research, the Bureau measured the dielectric properties of powdered minerals with medium to high electrical conductivities (a ≥ 0.02 Mho/m) in the frequency range of 300 MHz to 3 GHz using an open-ended coaxial line probe connected to an HP 8753A network analyzer. Since the minerals were prepared as powders, techniques were used to relate the measured dielectric properties of the powdered minerals to the dielectric properties of the mineral at Its theoretical or natural density. Also, these measurements were performed as a function of temperature, from 25° to 325° C.The measured values of the dielectric constants and loss tangents using this method were accurate within ±5 percent. This report describes the method of measurement and discusses the results of the Bureau's investigations into dielectric properties of minerals.

scholarly journals Study of the cheese salting process by dielectric properties at microwave frequencies

2018 ◽  
Vol 224 ◽  
pp. 121-128 ◽  
Author(s):  
J. Velázquez-Varela ◽  
M. Castro-Giraldez ◽  
L. Cuibus ◽  
J.A. Tomas-Egea ◽  
C. Socaciu ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Microwave Frequencies
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