# Blog

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*1 Septembrie 2020*In the autumn of 2019 we started a High Frequency Simulation and Verification Course using ANSYS products at the Faculty of Electronics, Bucharest. It consisted of 3 hours laboratory sessions taking place every 2 weeks. The course reunited undergraduate, master and even PhD students since participation was optional.Detalii

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*1 August 2020*This article is the final one from a pair of three, each characterizing a different frequency interval in the impedance profile of two parallel power planes. I investigated the capacitive interval in this older article, the inductance in a blog post from the last month available here and the resonances in planes in today’s article.Detalii

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*1 Iulie 2020*In this article I direct my attention toward the study of inductance. The reason why this measure is important to be studied is the same as previously mentioned with regard to capacitance, which I have in depth investigated in a previous article: almost every interconnect can be characterized up to a certain frequency as a lumped RLCG circuit.Detalii

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*1 Iunie 2020*For today, I directed my attention to studying the parallel plate approximation used to calculate the capacitance between two copper planes separated by a dielectric. This approximation does not take into account the fringe fields at the edges of the copper electrodes, which in some cases can become a large source of error.Detalii

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*1 Mai 2020*However, our focus is directed today on something different, the variation of the dielectric constant of a material with frequency. This matter could at first sound strange and in contradiction with its name of "constant". Moreover, if we think of the dielectric constant as the factor that determines the capacitance of a parallel-plate capacitor we obtain a frequency dependent capacitance...Detalii

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*1 Aprilie 2020*Capacitors, they store charge with the price of voltage between two plates separated by a dielectric. The main parameter that describes them is the capacitance and that is all we would like to find inside a capacitor, but how nothing in perfect in life, a small series (or parallel, depends of what model you choose to use) inductance and resistance...Detalii

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