Estimation for Wideband Electromagnetic Field Distribution from Printed Circuit Board with Switching Transistor(<Special Issue>Recent Development of Electro-Mechanical Devices (IS-EMD 2002))

概要

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To estimate the electromagnetic noise radiated from a printed circuit board (PCB) driven by a switching device, the finite difference time domain (FDTD) simulation method implementing the switching transistor is developed. The electric and magnetic field distributions on the signal line driven by a switching transistor are calculated or measured. These calculated and measured results show good agreement. The electric and magnetic field noises at typical impedance conditions modeled for the switching condition, i.e., the ON or OFF state of the transistor, are estimated by the FDTD calculation. The variation of the radiation noise when the switching transistor is turned ON or OFF is large at 216 MHz, whose input impedance of the signal line is small. It is speculated that the noise radiation at the 10Ω signal source impedance condition that is modeled for the ON condition shows good agreement with the noise distributions at the driving condition.
一般社団法人電子情報通信学会の論文
2003-06-01