Summary
International Symposium on Electromagnetic Compatibility
2009
Session Number:21Q2
Session:
Number:21Q2-1
Radiation Noise Reduction Effect Using Capacitor with Resistor on Double-Layer Board
T. Hakoda,
pp.89-92
Publication Date:2009/7/20
Online ISSN:2188-5079
Summary:
The purpose of this study is to estimate the radiation noise reduction effect by using the capacitor with resistor on a double-layer board. In the most application the power distribution of the multi-layer printed circuit board is realised by double-layer board. In many cases, the radiation peaks are radiated from the power-ground layer appears at the layer resonance frequencies. As one of the methods to suppress such radiation, the capacitor with series resistor was investigated in this study. The resistor is able to dump the resonance, however, it makes the impedance higher. From some experiments, it is known that the capacitors with resistor which one mounted at the corners of the board reduce the resonance and also suppress the radiation from the Double-Layer board. And it is also known t hat the reduction effect of the radiation is related to the number of the capacitors.