Biaxial Permittivity Determination for Electrically Small Material Specimens of Complex Shape Using Shorted Rectangular Waveguide Measurements

Scott, Mark M.; Faircloth, Daniel L.; Bean, Jeffrey A.; Holliday, Samuel G.

doi:10.1109/tim.2013.2289081

Cited by 11 publications

(13 citation statements)

References 13 publications

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“…The iteration is driven to convergence by a sequential global/local algorithm. Reference details this process and a short summary will be repeated for this letter. The WG‐specimen geometry shown in Figure will prove illuminating during the discussion which follows.…”

Section: Parameter Extraction Methodology and Measurement Resultsmentioning

confidence: 99%

“…During the frequency‐by‐frequency material parameter extraction, measured S 11 data for the requisite orientations are compared with many S 11 simulations obtained for various material parameter tensors. A population‐based algorithm followed by a local gradient‐based search controls the convergence of the extraction . The specimen is assumed to obey effective media theory.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Permittivity and permeability determination for high index specimens using partially filled shorted rectangular waveguides

Scott

Faircloth

Bean

et al. 2016

Microw. Opt. Technol. Lett.

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Section: Parameter Extraction Methodology and Measurement Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Permittivity and permeability determination for high index specimens using partially filled shorted rectangular waveguides

Scott

Faircloth

Bean

et al. 2016

Microw. Opt. Technol. Lett.

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“…The model described by (3) and (4) assumes a homogeneous medium between the receiving and emitting antennas. In reality, a salt diapir is formed by the layers of sedimentary salt emerged from the evaporation of ancient seas [31].…”

Section: A Radio Wave Propagation Model For a Heterogeneous Layered mentioning

confidence: 99%

“…T HERE are several methods available to accurately measure in a laboratory environment the complex permittivity of discrete samples of solid dielectric media: some use time domain analysis [1], [2], other a shorted rectangular waveguide [3], [4], the method of cavity perturbation [5], [6], or the capacitance method [7]. There are also specific methods for low-permittivity and low-loss homogeneous materials [8], [9], for liquid dielectrics [10], [11] etc.…”

Section: Introductionmentioning

confidence: 99%

A Large Scale Characterization of the Dielectric Properties of Heterogeneous Layered Rock Salt

Badescu

2020

IEEE Trans. Geosci. Remote Sensing

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Although there are several methods described in the literature to accurately measure the complex permittivity of solid dielectrics at radio frequencies in a laboratory environment, none of these methods allow for a large-scale accurate characterization of natural ionic dielectrics. The work presented here reports results of the dielectric permittivity retrieved from in situ measurements in a Romanian salt mine. Measurements were performed in the 164-174-MHz bandwidth, over a propagation distance of 100 m. The characteristics of the layers of sedimentary salt are determined from measurements using a least mean square fitting algorithm, based on a detailed propagation model for a heterogeneous medium. The coupling of the instrumentation is also considered. The proposed approach demonstrates great promise for a large number of applications.

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“…Recent advances in the characterization of anisotropic electromagnetic materials in the ultra high frequency (UHF) and very high frequency (VHF) bands have been facilitated by the combined use of computational electromagnetic (CEM) simulation tools, global/local search algorithms, and partially filled rectangular waveguides (see, e.g., ). The use of computational tools permits the simulation of the multiple and complex waveguide‐specimen geometries needed for the extraction of permittivity tensor elements.…”

Section: Introductionmentioning

confidence: 99%

Broadband isotropic and anisotropic permittivity determination using partially filled coaxial airlines

Scott

Morris

Reid

et al. 2015

Micro & Optical Tech Letters

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A method for determining the complex permittivity for material specimens with isotropic or biaxially anisotropic dielectric properties is described and representative measured results are presented. The method extracts the material permittivity through the utilization of computational electromagnetic simulations of specimen transmission measurements made with a broadband (50 MHz to over 500 MHz) coaxial airline with a material specimen which partially fills the waveguide cross‐section. A number of independent transmission measurements equal to the number of unknown permittivity terms is required for unique material permittivity determination. For isotropic specimens, a single specimen orientation is required, whereas for anisotropic specimens, different specimen orientations in the airline are required to probe the unknown permittivity axes and thus ensure unique material permittivity determination. Measurements using a 3.5‐inch outer diameter coaxial airline were made for known isotropic specimens as well as an anisotropic lossy material specimen. This technique provides the material measurement community with a mechanism to characterize a single specimen of complex shape and biaxial dielectric anisotropy at low frequencies covering multiple rectangular waveguide bands simultaneously and represents a significant advance in the current measurement state‐of‐the‐art particularly at frequencies below 100 MHz. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1864–1868, 2015

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Biaxial Permittivity Determination for Electrically Small Material Specimens of Complex Shape Using Shorted Rectangular Waveguide Measurements

Cited by 11 publications

References 13 publications

Permittivity and permeability determination for high index specimens using partially filled shorted rectangular waveguides

Permittivity and permeability determination for high index specimens using partially filled shorted rectangular waveguides

A Large Scale Characterization of the Dielectric Properties of Heterogeneous Layered Rock Salt

Broadband isotropic and anisotropic permittivity determination using partially filled coaxial airlines

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