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This paper provides a modeling methodology for high-capacitance multilayer ceramic capacitors (MLCCs) based on the transmission-line theory. To model the high-capacitance MLCC comprised of hundreds of thin layers, a distributed equivalent circuit is modified to a transmission-line circuit. Simpler models for MLCCs are demonstrated using a continued fractions approximation from the transmission-line input impedance equation. A second-order model predicts MLCC characteristics up to the first self-resonant frequency, and a fourth-order model corresponds more accurately to the MLCC behavior up to 100 MHz. In addition, model parameters are extracted using the measured impedance and physical dimension data without optimization.
Components, Packaging and Manufacturing Technology, IEEE Transactions on (Volume:2 , Issue: 6 )
Date of Publication: June 2012