Simultaneous Evaluation of Permeability and Permittivity Using a Flexible Microstrip Line-Type Probe up to 67 GHz

Yabukami, S.; Iwasaki, Chikashi; Nozawa, Kouhei; Takahashi, Shogo; Okita, K.; Chatani, K.

doi:10.1109/tmag.2021.3091522

Cited by 6 publications

(2 citation statements)

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“…7, the demagnetizing effect was dominant using the probe. Therefore, the measured FMR frequency shifted about 5 GHz, which was higher than that of the Nicolson-Ross-Weir method 16) . The FEM simulation was performed using HFSS (ANSYS Electronics Desktop 2020R1).…”

Section: Analysis and Experimentsmentioning

confidence: 64%

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Analysis of Demagnetizing Effects on Microstrip Line Type Probe for the Permeability Measurement of Thick Specimen

et al. 2022

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This study analyzed the demagnetizing effect for a permeability measurement of a thick NiZn ferrite sheet (100 m thickness) applied using a microstrip line type probe. The ferromagnetic resonance of the NiZn ferrite sheet was observed by two probes with different width conductors. The FMR frequency decreased as the offset between the microstrip conductor and the specimen increased. The two demagnetizing factors were estimated using the ferromagnetic resonance and FEM analysis, and the two values were almost equal. We simulated permeability using FEM, considering the intrinsic permeability of NiZn ferrite (evaluated using the Nicolson-Ross-Weir method) and the demagnetizing effect. The simulated permeability roughly corresponded with the measured value of the microstrip line type probe with a narrow conductor (0.36 mm wide). These results show that the demagnetizing effect is dominant for the high frequency permeability measurement of the thick specimen.

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Section: Analysis and Experimentsmentioning

confidence: 64%

“…3 Photo of the MSL probe. This probe has a narrow microstrip line (0.36 mm wide (left) 16) and 1.2 mm wide (right) 22) ) and copper block as return pass. These values are calculated using FEM along the center line "y" of the specimen.…”

Section: Analysis and Experimentsmentioning

confidence: 99%

Analysis of Demagnetizing Effects on Microstrip Line Type Probe for the Permeability Measurement of Thick Specimen

et al. 2022

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A high sensitivity planar electric–magnetic isolated sensor for full characterization of magneto-dielectric materials

Wang,

Liu,

Zhang

et al. 2024

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Method for measuring magnetic susceptibility of magnetic nanoparticles up to millimeter-wave frequency range

et al. 2023

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A novel method for measuring the complex magnetic susceptibility of magnetic nanoparticles (MNPs) has been developed by a broadband microstrip line-type probe with a frequency range of up to 50 GHz. Two external orthogonal DC fields, Hhard and Heasy, were applied to change the susceptibility of MNPs (Streptavidin coated, 200 nmϕ, number of MNPs about 1010) based on magnetization switching theory. The susceptibility of MNPs in the liquid, solid state, and after biotin-avidin reaction with polymer beads (2 μmϕ, number of polymer beads about 108) was evaluated. A clear FMR frequency of MNPs and the same FMR frequency shift trend as Hhard changed was observed around 2–10 GHz in both liquid and solid states. The susceptibility of MNPs reached maximum when Hhard was 0.1 T which is approximately equal to Heasy (0.135 T). The maximum values of real and imaginary parts increased by a factor of 3.39 and 1.66 compared to when Hhard was 0. The obtained results indicate that the magnetic anisotropy was successfully controlled in the liquid and solid states of MNPs aggregate. Furthermore, after the biotin-avidin reaction of MNPs with polymer beads, the imaginary part of susceptibility showed a decreasing trend regardless of the increase in Hhard, and its half-width expanded by 35.1% at maximum when Hhard was 0.15 T.

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Simultaneous Evaluation of Permeability and Permittivity Using a Flexible Microstrip Line-Type Probe up to 67 GHz

Cited by 6 publications

References 5 publications

Analysis of Demagnetizing Effects on Microstrip Line Type Probe for the Permeability Measurement of Thick Specimen

Analysis of Demagnetizing Effects on Microstrip Line Type Probe for the Permeability Measurement of Thick Specimen

A high sensitivity planar electric–magnetic isolated sensor for full characterization of magneto-dielectric materials

Method for measuring magnetic susceptibility of magnetic nanoparticles up to millimeter-wave frequency range

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