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Shared-antipad via structure is commonly used for high-speed printed circuit board (PCB) design. Therefore, an accurate via-plane capacitance evaluation for this kind of geometry is critical to facilitate engineering design. In this paper, the analytical equation of via-plane capacitance for separated-antipad via structure is extended to the shared-antipad via structure case, by using the equivalent...
A novel approach of using node-based, second-order polynomial shape functions to substitute the degrees of freedom corresponding to slave nodes by a linear combination of those corresponding to master nodes is shown to be a powerful and accurate tool to couple non-conforming meshes. This method is investigated and proposed to be used to consider moving domains, especially rotating parts. The numerical...
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