Accuracy in Permeability Measurement by a Combined Microstrip Line-Coaxial Conductor Method

Keigo KANEMARU  Atsushi KURAMOTO  Tomohiko KANIE  Yuichi NORO  Takashi TAKEO  

IEICE TRANSACTIONS on Electronics   Vol.E94-C   No.3   pp.327-333
Publication Date: 2011/03/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E94.C.327
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Microwaves, Millimeter-Waves
coaxial conductor,  error correction,  measurement error,  microstrip line,  permeability measurement,  

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In this paper, accuracy or error in permeability measurement using a combined microstrip line-coaxial conductor method was investigated. The measurement circuit used in this study is composed of a microstrip line (MSL) circuit and a grounded metal pipe with a center conductor passing through it coaxially. A sample is placed between the metal pipe and the center conductor. We evaluated the measurement accuracy for this measurement arrangement with electromagnetic simulation for the case where there are gaps between the sample and the holder. As a result, it has been shown that the normalized errors for this method have similar gap size dependence to the conventional coaxial method, but are about 10 to 20 percent greater than the coaxial method. With a view to improving the measurement accuracy, a correction method for the error is also discussed.