Abstract
This study is to clear the frequency characteristics of spatial distribution of electromagnetic noise inside of 3 m around Printed Circuit Board (PCB) by simulation and experiment. It is also discussed that Finite Difference Time Domain Method (FDTD Method) is the useful tool to estimate the frequency characteristic of spatial distribution for electric and magnetic field around PCB. By comparison between electric and magnetic near field spectrum above the printed line by simulation, these spectrums have differences in the resonance frequency. When the characteristics of the electric and magnetic field strength at 60 ns after the excitation is calculated, the electric field is decreased, the magnetic field is not decreased, as the distance from PCB is farther. From characteristics of particular frequencies, the electric field spectrum at 3 MHz, i.e. clock pulse, is decreased, whereas magnetic field is not decreased. The electric and magnetic field strength at resonance frequency, 417 MHz, is decreased in inverse proportional to the square of the distance. It is also cleared that the low frequency magnetic field strength may be superior to higher frequency.
| Original language | English |
|---|---|
| Pages (from-to) | 369-374 |
| Number of pages | 6 |
| Journal | IEEE International Symposium on Electromagnetic Compatibility |
| Volume | 1 |
| Publication status | Published - 2000 Jan 1 |
| Event | 2000 IEEE International Symposium on Electromagneti Compatibility - Washington, DC, USA Duration: 2000 Aug 21 → 2000 Aug 25 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering