Abstract
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 10 Ω signal source impedance condition that is modeled for the ON condition shows good agreement with the noise distributions at the driving condition.
| Original language | English |
|---|---|
| Pages (from-to) | 995-1001 |
| Number of pages | 7 |
| Journal | IEICE Transactions on Electronics |
| Volume | E86-C |
| Issue number | 6 |
| Publication status | Published - 2003 Jun |
Keywords
- Electromagnefic noise
- FDTD method
- PCB
- Switching transistor
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering