Complex permittivity and permeability estimation by reflection measurements of open and short coaxial transmission line

Staszek, Kamil; Gruszczyński, Sławomir; Wincza, Krzysztof

doi:10.1002/mop.28132

Cited by 12 publications

(2 citation statements)

References 22 publications

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“…It is necessary to emphasize that the two magnetic poles of the magnet are aligned along the sides of the coaxial airline fixture so that the generated dc magnetic field can be made normal to the propagation direction of the microwave signal. By the transmission/reflection method, the accurate microwave electromagnetic properties of the samples can be obtained by an inversion calculation of the S parameters in VNA30. Since the dc magnetic field is superimposed upon the microwave signal, it is necessary to clarify whether the applied dc magnetic field will be affected by the microwave field.…”

Section: Resultsmentioning

confidence: 99%

Ferromagnetic resonance induced large microwave magnetodielectric effect in cerium doped Y3Fe5O12 ferrites

Chen

Wang

Nie

et al. 2016

Sci Rep

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In recent years, multifunctional materials contained simultaneous ferroelectric and ferromagnetic ordering have been realized. Here, a real time room temperature adaptive materials system, which demonstrates an RF magnetodielectric (MD) response, i.e., CexY3−xFe5O12 (x = 0, 0.05, 0.1, 0.15, 0.2), is reported. The magnetic and dielectric properties of Ce-doped YIG microwave ferrites processed by a traditional ceramic route have been measured over a frequency range of 4–8 GHz (C-band). The substitution of Ce not only enhances the microwave electromagnetic properties of the YIG, but also modulates the magnetodielectric response. The maximum magnetodielectric response in Ce-doped YIG sample ranges in magnitude from approximately +5% to −5% under an applied field of 1.78 kOe. This effect was attributed to electron fluctuations on the Fe cation sites. Furthermore, the magnitude of the MD response was shown to be enhanced by the cerium content. It is believed that research of the magnetodielectric effect in YIG ferrites is of great importance to the development of next generation multifunctional adaptive microwave materials, devices and integrated circuits.

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Section: Resultsmentioning

confidence: 99%

Ferromagnetic resonance induced large microwave magnetodielectric effect in cerium doped Y3Fe5O12 ferrites

Chen

Wang

Nie

et al. 2016

Sci Rep

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“…Then, at the sampled data post-processing stage, a phase correction was applied to shift the calibration plane to the measurement plane. The measured reflection coefficient can be calculated as follows [13],…”

Section: Uncertaintiesmentioning

confidence: 99%

Preliminary Experimental Measurements of the Dielectric and Magnetic Properties of a Material With a Coaxial TDR Probe in Reflection Mode

Farhat¹,

Farrugia²,

Persico³

et al. 2020

PIER M

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This paper presents a technique based on time domain reflectometry (TDR) to determine the dielectric and magnetic properties of lossless materials fitted inside a transmission line section. The proposed method involves three different line terminations namely open, short, and matched load. The described technique involves placing a sample of material under test (MUT) inside a terminated transmission line and exciting this with a vector network analyser from the other end to measure the reflection coefficient. Results achieved from a transmission line model were compared with numerical simulations obtained using CST Microwave Studio. The comparison shows that the electric and magnetic properties of a material may be determined precisely with this technique. Experimental results are also presented to validate the proposed method. Estimates of measurement errors, resulting from sample length uncertainty, vector network analyser uncertainty, and open-end inaccuracy are discussed.

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Multi-interfacial TiO2/carbon fibers encapsulated with needle-like FeCo2O4 for excellent microwave absorption

Deng

et al. 2023

Applied Surface Science

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Complex permittivity and permeability estimation by reflection measurements of open and short coaxial transmission line

Cited by 12 publications

References 22 publications

Ferromagnetic resonance induced large microwave magnetodielectric effect in cerium doped Y3Fe5O12 ferrites

Ferromagnetic resonance induced large microwave magnetodielectric effect in cerium doped Y3Fe5O12 ferrites

Preliminary Experimental Measurements of the Dielectric and Magnetic Properties of a Material With a Coaxial TDR Probe in Reflection Mode

Multi-interfacial TiO2/carbon fibers encapsulated with needle-like FeCo2O4 for excellent microwave absorption

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