Summary
International Symposium on Electromagnetic Compatibility
2014
Session Number:14A2-B
Session:
Number:14A2-B3
A low cost capacitor approach for suppressing resonance in power distribution networks
Koh Yamanaga,
pp.-
Publication Date:2014/05/12
Online ISSN:2188-5079
DOI:10.34385/proc.18.14A2-B3
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Summary:
Resonances in power distribution network are themajor cause of voltage fluctuation and noise problems. Inthis paper, a new method that suppresses impedance peak isproposed. The proposed method uses a high series resistance(HSR) capacitor in parallel to regular bypass capacitors. Byselecting the parameters so that the series resonance frequencyof the HSR capacitor equals to the anti-resonance frequencyof the bypass capacitors, current path will be formed throughthe HSR capacitor, suppressing the impedance peak. Relativelylow required capacitance in this configuration enables low costfabrication of the HSR capacitor. Experimental measurementsusing a double-side printed circuit board have shown that theproposed method lowers the peak impedance by 10-fold andreduces radiation noise by 10 dB.