The dual polarization method for characterization of dielectric materials

Fenner, Raenita A.; Rothwell, Edward J.; Frasch, L.L.

doi:10.1080/09205071.2015.1109005

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Methods for measuring material properties using reflection properties are reported in [ 21 , 22 ]. In this section, the material property estimation method is presented.…”

Section: Methodsmentioning

confidence: 99%

Complex Permittivity Measurements of Steel Fiber-Reinforced Cementitious Composites Using a Free-Space Reflection Method with a Focused Beam Lens Horn Antenna

Cho¹,

Noh

et al. 2021

Sensors

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To measure the electromagnetic properties of steel fiber-reinforced concrete (SFRC) in the X-band, 1-port measurements were performed using a lens horn antenna in a free-space measurement system. Free-space 1-port calibration with translations of the position of the reflector regarding the characteristics of the focused beam lens horn antenna was applied. The intrinsic impedance and complex permittivity of the SFRC were obtained from the measured reflection characteristics. The steel fiber content increased and the electromagnetic properties of the SFRC gradually changed from a dielectric to a conductor, even in very low frequencies compared to the plasma frequencies of general metal, which are optical frequencies. This is considered to be the plasmon effect of the metallic structure formed by the steel fiber. This result is applicable for analyses of the electromagnetic phenomenon of large structures with fiber content.

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“…Methods for measuring material properties using reflection properties are reported in [ 21 , 22 ]. In this section, the material property estimation method is presented.…”

Section: Methodsmentioning

confidence: 99%

Complex Permittivity Measurements of Steel Fiber-Reinforced Cementitious Composites Using a Free-Space Reflection Method with a Focused Beam Lens Horn Antenna

Cho¹,

Noh

et al. 2021

Sensors

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“…Generally, the two independent measurements can be obtained by either altering the incident field or altering the layered sample stack of the material under test (MUT). An example technique which alters the incident field is the dual-polarization technique where the reflection coefficient is measured when the incident field is at parallel polarization and a second time when the incident field is at perpendicular polarization [17]. Methods which alter the sample stack may vary the position of the sample within the stack or the composition of the adjacent layers behind the MUT.…”

Section: Review Of Free Space Reflection-only Extraction Equationsmentioning

confidence: 99%

A Comprehensive Error Analysis of Free-Space Techniques for Extracting the Permeability and Permittivity of Materials Using Reflection-Only Measurements

Fenner¹,

Shah²

2021

PIER M

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The electromagnetic characterization of layered materials is applicable to many different applications. In previous work it has been shown that reflection-only techniques -which vary the underlying structure of the sample stack to obtain two independent measurements -are a variation of a single unifying scheme such that there is a single set of closed-form unifying extraction equations for the electric permittivity and magnetic permeability. In this paper, the error propagation method is applied to this single set of closed-form extraction equations in order to derive an accompanying set of closed-form equations to predict the measurement uncertainty of electric permittivity and magnetic permeability. An error analysis is performed on the layer-shift method, and results are compared to a Monte Carlo simulation to prove the viability of the general error analysis equations.

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Characterization of Conductor-Backed Dielectric Materials With Genetic Algorithms and Free Space Methods

Fenner

Rothwell

Frasch

et al. 2016

IEEE Microw. Wireless Compon. Lett.

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The dual polarization method for characterization of dielectric materials

Cited by 3 publications

References 9 publications

Complex Permittivity Measurements of Steel Fiber-Reinforced Cementitious Composites Using a Free-Space Reflection Method with a Focused Beam Lens Horn Antenna

Complex Permittivity Measurements of Steel Fiber-Reinforced Cementitious Composites Using a Free-Space Reflection Method with a Focused Beam Lens Horn Antenna

A Comprehensive Error Analysis of Free-Space Techniques for Extracting the Permeability and Permittivity of Materials Using Reflection-Only Measurements

Characterization of Conductor-Backed Dielectric Materials With Genetic Algorithms and Free Space Methods

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