EMI and PI analysis of analog board

The analysis object of this paper is a four-layer analog PCB board. First, EMI analysis was done by simulating the radiation of this board with the hyperlynx software. Thus the biggest radiation net and the longest net could be selected. Near field radiation, far field radiation and S parameters analysis then would be performed to these two nets in SIwave. And in Cadence software, power integrity simulation is done. By setting the target impedance, this paper compares the performance of the power supply board with the target performance curve. An improved method is put forward after each analysis.