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

S. Yabukami, C. Iwasaki, K. Okita, K. Nozawa, S. Takahashi, K. Chatani

Research output: Contribution to journalArticlepeer-review

Abstract

Complex relative permeability and permittivity were evaluated simultaneously in the band of 100 MHz-67 GHz using a flexible microstrip line-type probe. In principle, the probe can evaluate the permeability and permittivity of electromagnetic materials regardless of size. The measured permeability and permittivity were obtained from the transmission coefficient ( S_21 ). Since S_21 under the infinite magnetic field can be estimated by changing the dc magnetic field stepwise, the magnetic and dielectric signals were separated accurately. The complex permeability and permittivity of a NiZn ferrite sheet (10 mm ×10 mm, 0.1 mm thick) and polytetrafluoroethylene (PTFE) (25 mm ×25 mm, 0.79 mm thick) were evaluated accurately.

Original languageEnglish
JournalIEEE Transactions on Magnetics
Volume58
Issue number2
DOIs
Publication statusPublished - 2022 Feb 1

Keywords

  • Complex relative permeability measurement
  • microstrip line-type probe
  • permittivity measurement
  • sample size limitation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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