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Using modified nodal analysis in cavity-mode resonances printed circuit board power bus structures with the segmentation method

ABSTRACT In this paper, we used the modified nodal analysis (MNA) method to obtain the cavity-mode equation for the segmentation method. In the experiment, the calculation result of MNA is more accurate than traditional double summation with discrete capacitors. The proposed approaches decrease computation and easily add discrete capacitors. The MNA and segmentation methods can be combined to conveniently calculate an irregularly shaped cavity by using computers. This approach can reduce the time required for deriving the impedance equation. The result can be used to build a mathematical model of the MNA method, which can suppress cavity-mode resonances within the power bus by using discrete capacitors. We used electromagnetic simulation software to verify these models.