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Simplified Local Specific Absorption Rate Measurement Method Using Lightweight Phantom Composed of Wave Absorber Embedded of Electric Field Probe

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5 Author(s)
Michishita, N. ; Dept. of Electr. & Electron. Eng., Nat. Defense Acad., Yokosuka, Japan ; Watanabe, T. ; Yamada, Y. ; Arai, H.
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In this paper, a simplified local SAR measurement method is developed. A lightweight phantom composed of wave absorber embedded of electric field probe is designed. The relative permittivity and conductivity of wave absorber is determined in order to equalize the surface electric field of the wave absorber and the standard liquid phantom. For this purpose, it is suitable to equalize the amplitude of the surface impedances of the two cases. The internal electric field is estimated with the estimated penetration depth. The peak spatial-average SAR of an inverted F-antenna mounted on a metal plate using the proposed measurement method is almost identical to the analytical result of the liquid phantom. The error of the proposed measurement method is within the allowable limits including measurement error.

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Electromagnetic Compatibility, IEEE Transactions on  (Volume:54 ,  Issue: 1 )