Non-resonant Permittivity Measurement Methods

Severo, S. L. S.; Salles, Álvaro Augusto Almeida de; Nervis, Bruno; Zanini, Braian Kaiser

doi:10.1590/2179-10742017v16i1890

Cited by 27 publications

(19 citation statements)

References 15 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Основная идея метода заключается в измерении комплексных коэффициентов передачи (S 21 ) и отражения (S 11 ) при прохождении тестового сигнала через закрытую линию передачи (Рис. 2) без образца исследуемого материала и с образцом [4,5,6,7,8,9,10,11,12]…”

Section: нерезонансный методunclassified

Analysis of methods for measuring the dielectric properties of materials in the microwave range of wavelengths.

Fomin¹,

Dudarev²,

Darovskikh³

2021

JRE

View full text Add to dashboard Cite

One of the modern trends in the development of communication systems, information and telecommunication systems, air traffic control systems, etc. is the transition and development of higher-frequency wavelength ranges. In this regard more and more stringent requirements (in terms of spectrum, out-of-band and spurious radio emission, and in the shape of the output signal) are imposed on radio engineering devices that transmit and receive microwave radio signals. As a result, the requirements for the design and functional features of microwave electronic devices are increasing. One of these requirements is to assess the degree of compliance with the required values of dielectric properties of materials used in the design of microwave electronic devices. This requirement is justified by the fact that the electrical parameters of such microwave devices as: strip filters, power dividers, printed antennas and others, directly depend on the dielectric properties of the materials used in their substrate designs. In this regard, three main methods have now emerged for assessing the dielectric properties of materials: the resonant method, the non-resonant method, and the free space method. Aim. The aim of this article is to carry out a comparative analysis of the known methods for measuring the dielectric properties of materials in the microwave range of wavelengths and devices for their implementation. Materials and methods. The authors of the article reviewed the scientific literature of domestic and foreign publications. Results. For each of the methods for measuring the dielectric properties of materials, their main idea, practical implementation, a mathematical model for processing experimental data and areas of application are given. The advantages and disadvantages for each of the methods for measuring the dielectric properties of materials are given too. Conclusion. The applicability of each of the considered methods depends on such factors as: the shape of the investigated dielectric material, its state of aggregation, the possibility of measuring amplitude or complex transmission and reflection coefficients, the presence of an anechoic chamber, etc.

show abstract

Section: нерезонансный методunclassified

Analysis of methods for measuring the dielectric properties of materials in the microwave range of wavelengths.

Fomin¹,

Dudarev²,

Darovskikh³

2021

JRE

View full text Add to dashboard Cite

show abstract

“…Considering the frequency range [2][3][4][5][6][7][8][9][10][11][12] GHz from Fig 9 and using a single or/and transmission line as well as two transmission line techniques with and without correction, terminated by an open-circuit configuration, it is clearly observed that the developed method using equation ( 18) is more suitable in comparison to those transmission line techniques as illustrated in Fig 10. The two transmission-line techniques yielded results with incertitude or a relative error of 3-7%, depending on the frequency used [15].…”

Section: Fig 9 Different Open-terminated Transmission-line Technique Principles Comparisonmentioning

confidence: 99%

“…The distributed element technique, using iterative method [2] and/or transmission-line propagation constant [3]- [5], is a well-known technique. As methods can be destructive or not [6], researchers are in the habit of using the transmission structure in short-circuit [7] and/or open-circuit [8] configurations along with reflection/transmission [9] in order to get to the material intrinsic parameters.…”

Section: Introductionmentioning

confidence: 99%

Use of Two Open-Terminated Coaxial Transmission-Lines Technique to Extract the Material Relative Intrinsic Parameters

et al. 2020

View full text Add to dashboard Cite

We have presented an open-terminated transmission-line technique, based on the use of two substantially identical circular coaxial structures with different lengths, to extract the material relative permittivity ε r . All data acquisitions obtained from experimental measurements have been done at the entry of the connector-input source interface. The technique is well-utilized despite the test cell discontinuity, and it met the goal of extracting the relative intrinsic parameters with good accuracy. The technique improvement found its advantage in the scan of a large frequency range by introducing a new concept based upon the sum of the lengths of identical fixtures and the backward wave propagation. High order-modes propagation that restricts the frequency range in the transmission configuration is not a limit in this new technique. Otherwise, the measurement methodology, grounded in the principle of the automatic correction coefficient determination, is done to achieve the aim. Easily filling up the test cell with the sample to characterize, we validated the new broadband technique in [1.5 -15] GHz by using insulators like Aquarium sand, wheat semolina, and raffia (vinifera and laurentiis varieties). From the use of the same fixture, result comparisons have been done with those from the two-line technique.

show abstract

“…Other material techniques are investigated in several laboratories to better understand the different material properties and behaviors [2,4,5]. From microwave theory, material characterization methods can be categorized into two forms: non-resonant [6] and resonant processes [7], which can also be subdivided into two techniques, namely through one port technique [8] and two ports technique [9][10][11]. Among several existing methods [12,13], the probe or applicator method is well known [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Dual Coaxial Probes in Transmission Inserted by Dielectric With Two Different Thicknesses to Extract the Material Complex Relative Permittivity: Discontinuity Impacts

Mbango¹,

Ndagijimana²,

Okana³

2021

PIER C

View full text Add to dashboard Cite

After a thorough investigation, this paper introduces a novel and simple radiofrequency material characterization technique. For this study's purposes, two probes were developed and separated by the sample under test (SUT) with an inhomogeneous test cell. Furthermore, the discontinuity impacts at the probe, SUT interfaces, were also studied. The investigation uses the transmission process through the principle of two different SUT thicknesses to measure its relative permittivity and loss tangent. The technique is based on using the lumped elements of an equivalent circuit of the entire test cell and covers 1 MHz-2 GHz. With the SUT, placed between two metal probes and another metallization, placed under its thickness on an opposite side to improve the loss tangent acquisition level, the cascading chain matrix (CCM) is used to get the final parameters. The thickness changing makes it possible to overcome the contact interface effects probe-sample. A mathematical model has also been presented through the fitting procedure. The new technique has been validated with three materials: Rogers RO4003C, FR-4 HTG-175, and Alumina 99.6%. The SUT complex relative permittivity extraction makes the new approach suitable for the telecommunication industry and many others. The method is also ideal for materials with thickness sizing up to 3 mm around.

show abstract

Non-resonant Permittivity Measurement Methods

Cited by 27 publications

References 15 publications

Analysis of methods for measuring the dielectric properties of materials in the microwave range of wavelengths.

Analysis of methods for measuring the dielectric properties of materials in the microwave range of wavelengths.

Use of Two Open-Terminated Coaxial Transmission-Lines Technique to Extract the Material Relative Intrinsic Parameters

Dual Coaxial Probes in Transmission Inserted by Dielectric With Two Different Thicknesses to Extract the Material Complex Relative Permittivity: Discontinuity Impacts

Contact Info

Product

Resources

About