Since ( 5.6) does not consider the back coupling from the cavity field Into the cavity model ( 4.13) by vertical currents on ports Neglected and the vertical trace currents at the source and load positions Higher order parallel plate modes, excited by the horizontal trace current, decay rapidlyĪnd cannot reach the surrounding edges. This is also sufficient in case of a trace within the cavity, because Trace also has to be introduced into these models by current sources, connected to theĪnd ( 4.5) only the TMzm (magnetic field transversal in the zĭirection) mode m=0 is considered in the cavity model and the electric field has thus Since the models ( 4.13) and ( 4.14)Ĭan only be excited by currents supplied to the planes, the common mode coupling of a
While power-ground planes are excitedīy currents, which are galvanically supplied to the planes, an enclosure is excited byĬommon mode coupling from a PCB trace to the cavity between the ground plane and theĬover. Previous: 4.4 FEM solution for the two-dimensional Helmholtz equation Up: Contents Next: 5.1 Calculation of with mode decompositionĥ Introduction of sources and PCB layout structures to the cavity modelĮfficient power integrity analysis with cavity models for rectangular power planes
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