J. Mclean, R. Sutton, K. Takizawa, Akihiro Sato, Masataka Midori, Yuki Naito
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The Van Veen loop is intrinsically well adapted to time-domain measurements of net magnetic dipole moment. That is, the system comes very close to preserving the shape of the time-domain waveform of the net or residual magnetic dipole moment produced by the DUT. This property makes the Van Veen Loop very useful in the characterization of magnetic field wireless power transfer systems in which short-time-scale features such as ringing in inverter and rectifier circuits are present in the extraneous magnetic field. We present two modifications to the internal circuitry which further improve the time-domain performance of the system to the extent that it approaches having a distortionless transfer function. Finally, we present a physical explanation for the mechanism by which the time-domain performance is improved.