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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2009-09-23
Measure the Complex Permeability of Ferromagnetic Thin Films: Comparison Shorted Microstrip Method with Microstrip Transmission Method
By
Yunqiu Wu,

    Dr. Yunqiu Wu

    University of Electronic Science and Technology of China

    China

    Homepage

Zong-Xi Tang,

    Dr. Zong-Xi Tang

    University of Electronic Science and Technology of China

    China

    Homepage

Yuehang Xu,

    Prof. Yuehang Xu

    University of Electronic Science and Technology of China

    China

    Homepage

Biao Zhang

    Dr. Biao Zhang

    University of Electronic Science and Technology of China

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 11, 173-181, 2009
doi:10.2528/PIERL09082004 | Google Scholar

Abstract
In this paper, two broadband measurement methods, shorted microstrip method and microstrip trnasmission method, are discussed, and the complex permeability of ferromagnetic thin films is measured from 100MHz to 18GHz. The S-parameters of the two measurement fixtures are measured by vector network analyzer (VNA). The perturbations of the thin film loaded in the measurement fixture are analyzed; the discontinuity between coaxial and microstrip is considered; the effective permeability is deduced from measured S-parameters; the permeability of ferromagnetic thin films is extracted from effective permeability by using conformal mapping. The results show that the experimental results agree with the theoretical ones closely, and higher measurement sensitivity and accuracy are achieved by using shorted microstrip method.
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Citation
Yunqiu Wu, Zong-Xi Tang, Yuehang Xu, and Biao Zhang, "Measure the Complex Permeability of Ferromagnetic Thin Films: Comparison Shorted Microstrip Method with Microstrip Transmission Method," Progress In Electromagnetics Research Letters, Vol. 11, 173-181, 2009.
doi:10.2528/PIERL09082004
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