Efficient calculation of EMI factors from power distribution network using cavity resonance circuit model

The radiated emissions from the planar power distribution network (PDN) with decoupling capacitors are efficiently calculated using the cavity resonance circuit model. The emission from the polarization currents in dielectric medium is included in the calculation. The proposed calculation method is validated with the numerical computation results using the partial element equivalent circuit (PEEC) method. The radiated emission due to each current component is analyzed using the proposed method. Also, the effects of PDN geometry on the radiated emission are investigated with several case studies.