Estimating the Power Bus Impedance of Printed Circuit Boards with Embedded Capacitance

Minjia Xu
Todd H. Hubing, Missouri University of Science and Technology

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Embedded capacitance is an alternative to discrete decoupling capacitors and is achieved by enhancing the natural capacitance between closely spaced power and return planes. This paper employs a simple cavity model to investigate the features affecting the power bus impedance of printed circuit boards with embedded capacitance.