A broadband free-space dielectric properties measurement system at millimeter wavelengths

Friedsam, G.L.; Biebl, Erwin

doi:10.1109/cpem.1996.546779

Cited by 11 publications

(9 citation statements)

References 3 publications

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“…FSM method provides to measure S parameters under the conditions as contactless, nondestructive, and high temperature with wide frequency range and different substance forms and especially for nonhomogeneous materials. It is preferred to coaxial and waveguide measurement methods, since it does not need sample preparation [18,26]. Another disadvantage of waveguide method is seen as leakage around the sample and limitation of sizing sample [27].…”

Section: Features Of Fsm Methodsmentioning

confidence: 99%

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Measurement Methods and Extraction Techniques to Obtain the Dielectric Properties of Materials

Öztürk¹,

Guneser²

2019

Electrical and Electronic Properties of Materials

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Material characterization plays an important role in many applications that are called as security, military, communication, bioengineering, medical treatment, food industry, and material processing, since it is useful to identify other properties such as stress-strain relation, bio content, moisture content, materials density, etc. Therefore, the dielectric properties of materials should be achieved with high accuracy using appropriate measurement techniques and extraction techniques. There are many measurement methods to obtain the dielectric properties of materials, which can be divided into two categories: up conversion and down conversion methods. A microwave measurement method can be called as frequency up conversion, while THz time-domain spectroscopy (THz-TDS) system is a frequency down conversion method. The selection of more convenient measurement method depends on some parameters such as frequency range, material phase, and temperature. In this chapter, the measurement methods and extraction techniques will be discussed, and alternative ways will be presented with experimental and simulation results.

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Section: Features Of Fsm Methodsmentioning

confidence: 99%

“…Spot focus can be achieved using lenses that will minimize the diffraction effect for high accuracy measurements [23,26]. The antenna gain can also be increased, thanks to lenses that align the beam and reduce the diameter [29].…”

Section: Features Of Fsm Methodsmentioning

confidence: 99%

Measurement Methods and Extraction Techniques to Obtain the Dielectric Properties of Materials

Öztürk¹,

Guneser²

2019

Electrical and Electronic Properties of Materials

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“…A free space bench is performing the dielectric constant measurement [11,12]. The bench is made of two horn-lenses antenna to focus the signal in the sample under test.…”

Section: Free Space Measurementmentioning

confidence: 99%

Creation of a gradient index structure inside foam material - Microwave application for a lens antenna at 60 GHz

Bor

Lafond

Himdi

2014

2014 IEEE MTT-S International Microwave Symposium (IMS2014)

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International audience— Creating a gradient index into a dielectric structure is a major issue nowadays for the design of microwave components and antennas, especially for inhomogeneous lenses as Luneburg, Fresnel and Maxwell Fish-eye. The use of a foam material and a simple technological process can allow this. Because a foam material is composed of air bubbles, and core materials (resin, PVC, …), removing the air will increase the density of the foam and so increase its dielectric constant. The authors present a simple technological process to expel the air from a piece of foam in order to increase the permittivity of the foam. This is then applied to the design of a Luneburg lens antenna at 60 GHz

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“…Several methods have been developed in order to extract these properties. We distinguish various methods: resonant [6], free space [7], capacitive [8], transmission lines [9]. The transmission line method offers broadband characterization [10].…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of ceramic composite materials based on alumina reinforced by titanium carbide

Ouhassan¹,

Bri²,

El³

et al. 2020

FME Transactions

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The aim of this research work is to study the dielectric and microwave properties of the three ceramic composites Al2O3-TiC, Al2O3-0.3TiC and Al2O3-0.7TiC. The results obtained show that the effective permittivity increases with the increase in the filling rate of titanium carbide TiC inclusions and their contrasts. As for the classical mixing laws, they make it possible to estimate permittivity for low volume fractions and low contrasts. The values of the real part of the complex permittivity decrease with frequency increase in the two bands X and Ku, while the imaginary part is approximately constant in the X band and takes negative values in the Ku band.

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A broadband free-space dielectric properties measurement system at millimeter wavelengths

Cited by 11 publications

References 3 publications

Measurement Methods and Extraction Techniques to Obtain the Dielectric Properties of Materials

Measurement Methods and Extraction Techniques to Obtain the Dielectric Properties of Materials

Creation of a gradient index structure inside foam material - Microwave application for a lens antenna at 60 GHz

Dielectric properties of ceramic composite materials based on alumina reinforced by titanium carbide

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