Capacitors with two or three leads tend to make poor low-pass filters at high frequencies (e.g. greater than 100 MHz) due to the mutual inductance between the input and output sides of the filter. This work proposes a four-lead low-pass filter capacitor design that minimizes the magnetic flux coupling between the input and output. Measurements of a prototype capacitor confirm that it performs significantly better than a typical two-lead capacitor at high frequencies.
A. Ritter et al., "Analysis of a Low-Pass Filter Employing a 4-pin Capacitor," IEEE Transactions on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers (IEEE), Jan 2005.
The definitive version is available at http://dx.doi.org/10.1109/TEMC.2004.837957
Electrical and Computer Engineering
Keywords and Phrases
4-Pin Capacitor; Capacitors; Inductance; Low-Pass Filter; Low-Pass Filters; Magnetic Flux Coupling; Mutual Inductance; Network Synthesis
International Standard Serial Number (ISSN)
Article - Journal
© 2005 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.