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Numerical Analysis of Near-Field Magnetic Field for Automobile Electronic Key Systems

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4 Author(s)
Sugahara, K. ; Mitsubishi Electr. Corp., Hyogo ; Yamamoto, H.. ; Ouchi, H.. ; Nakano, Y..

We propose a numerical method for analyzing near-field magnetic fields for automobile electronic key systems. The surface of an automobile body is divided into triangular patches and a modified inductance matrix formulation is employed. A large inductance matrix equation is solved using a block Gauss-Seidel method. A source magnetic field produced by a ferrite bar antenna is analyzed using a magnetic moment method to formulate a right-hand vector of the matrix equation. We have made a simplified automobile model and measured leakage of magnetic fields from windows of the model. Analyzed results agreed with the measured results with an error of 10%.

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Magnetics, IEEE Transactions on  (Volume:43 ,  Issue: 8 )