Simultaneous measurement of permittivity and permeability of lossy sheet using flanged rectangular waveguide

Hayashi, Yoshinori; Mishima, Gen; Hirayama, Koichi; Hayashi, Yasuhiko

doi:10.1002/ecjb.10104

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…The material parameters of (12) (7) the sample are listed in Table 1. Since the sample is assumed to be infinitely large, the method of moments (MoM) [12] can be applied and the results are compared with those obtained by the finite element method (FEM). The two are found to agree well, so that the validity of the present analysis method is confirmed.…”

Section: Numerical Calculationsmentioning

confidence: 99%

“…For instance, both the complex permittivity and the complex permeability are determined from several measurements by using supplemental samples, as reported in Ref. 11. Recently, the authors have proposed a method of simultaneous measurement by inserting a sheet sample between flanged rectangular waveguides [12]. Since a rectangular waveguide is used in this measurement method, the setup becomes large when the material parameters are measured at frequencies lower than the X band.…”

Section: Introductionmentioning

confidence: 99%

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Application of FEM to measurement of permittivity and permeability of lossy sheet using coaxial line

Hayashi

Oba

Hirayama

2005

Electron. Comm. Jpn. Pt. II

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SUMMARYA method is proposed for simultaneous measurement of the complex permittivity and complex permeability of a sheet material by inserting a lossy sheet between two flanged coaxial lines. The TEM mode is incident from a coaxial line and the axially symmetric scalar finite element method is applied for the electromagnetic field without variation in the circumferential direction, to allow the reflection and transmission coefficients to be calculated. Then, a PML is loaded in order to take account of the electromagnetic field leakage in the gap between the flanges. Also, the inverse problem is formulated by using Newton's method. Further, a measurement system is constructed and an experiment is carried out. In addition to confirming the effectiveness of the present measurement method, the range of applicability of the method is studied.

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Section: Numerical Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of FEM to measurement of permittivity and permeability of lossy sheet using coaxial line

Hayashi

Oba

Hirayama

2005

Electron. Comm. Jpn. Pt. II

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“…There are various transmission/reflection techniques for measuring the dielectric properties of dielectric samples [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Transmission/reflection Techniquesmentioning

confidence: 99%

Comparisons of microwave dielectric property measurements by transmission/reflection techniques and resonance techniques

Sheen

2009

Meas. Sci. Technol.

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This review provides a general comparison of the two most commonly used techniques for measurement of complex permittivity at microwave frequencies: transmission/reflection and resonance. The transmission/reflectance techniques are analyzed using distributed and lumped impedance models. The resonance techniques are analyzed using both dielectric and cavity resonance models. The analysis, combined with experimental results, enables us to illustrate the advantages and disadvantages of the various techniques and provide guidance on which techniques to use under particular circumstances. In general, transmission/reflection techniques can be used over a broad band of frequencies, and are suitable for loss measurements on high loss materials. Resonance techniques do not have swept frequency capability, but have higher accuracy for measurement of the real part of permittivity and can measure the loss tangent of low loss materials with high resolution.

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“…Additionally, a free space method using horn antennas is also applied in the high frequency more than the microwave band. Furthermore, the nondestructive measurement methods using an open-ended waveguide and an open-ended coaxial line were previously proposed for a solid lossy material [3][4][5][6][7][8]. On the other hand, although a powdered material is also used for fabricating a wave absorber, the measurement method of the complex permittivity and permeability for a powdered material is not fully examined and is not established as a general measurement method [9].…”

Section: Introductionmentioning

confidence: 99%

Measurement method of complex permittivity and permeability for a powdered material using a waveguide in microwave band

Ebara¹,

Inoue

Hashimoto

2006

Science and Technology of Advanced Materials

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This paper proposes the measurement method of the complex permittivity and permeability for a powdered material based on measuring the effective permittivity and permeability using a waveguide in the microwave band. The powder of the silica and the ferrite were prepared for the verification of the proposed measurement method. In order to measure the S-parameter of these powdered materials, two open-ended waveguides infilled with a Teflon at the waveguide end and the sample holder, which is constructed from the same material as the waveguide, are fabricated. The powdered materials are filled into the sample holder in a number of volume ratios, which represent the ratio between the silica and air, the ferrite and air, respectively. The effective permittivity and permeability of the powdered materials are measured using the vector network analyzer for each volume ratio of the powdered materials in the frequency range from 4.0 to 5.8 GHz. The relationship between the volume ratios of the powdered material and the measured effective permittivity and permeability is derived for each measurement frequency. Then, the complex permittivity and permeability of the powdered materials are estimated by using the measured effective permittivity and permeability and the Lichtenecker's formula. In our measurement method, the Lichtenecker's formula, which is generally used for deriving the effective permittivity and permeability of a mixture, is applied to the estimation of the complex permittivity and permeability of only the material constituting the powder. We confirmed that the measurement results are in comparatively good agreement with the effective permittivity and permeability derived using Lichtenecker's formula. The proposed measurement method is considered to be effective as the measurement, which can be performed easily for a powdered material in the microwave band. q

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Simultaneous measurement of permittivity and permeability of lossy sheet using flanged rectangular waveguide

Cited by 3 publications

References 5 publications

Application of FEM to measurement of permittivity and permeability of lossy sheet using coaxial line

Application of FEM to measurement of permittivity and permeability of lossy sheet using coaxial line

Comparisons of microwave dielectric property measurements by transmission/reflection techniques and resonance techniques

Measurement method of complex permittivity and permeability for a powdered material using a waveguide in microwave band

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