Abstract
It is well-known that the frequencies of radiated peak emissions due to the ground bounce of a printed circuit board (PCB) are related to the resonance frequencies of the input impedance between the power and ground planes (PCB input impedance), while their correspondence relationship is unclear. In this paper, we investigated the quantitative relationship between the frequencies of peak emissions radiated from a PCB and the resonance resistances of the PCB impedance from measurement and finite-difference time-domain (FDTD) analysis. As a result, we found that the ratio of squared electric far-fields at the PCB resonance frequencies corresponds to the ratio of radiated resonance power. This finding leads to the conclusion that the radiated peak emission frequency can be predicted from PCB resonance resistances and the internal resistance of the PCB excitation source
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