| Interactions between electronicsystems and high electromagneticenvironment andcoupling calculation are studied based on the Electromagnetic Topology method. Basedon the Electromagnetic topology graph method, the interactions are studied. Thecoupling between printed lines and electromagnetic field is analyzed and calculated byanalytic method.The couplingbetween electronic components in the electronic systemsand electromagnetic field is evaluated through experiments. In this paper specific workareasfollows:First,we give a new algorithm of finding all the paths which have a lowershielding coefficient than the given threshold K in the electromagnetic topologicalshieldinggraph.Second, using analytic method, we prove that Taylor model, Agrawal model andRachidi model are equivalent when the two-conductor is perfect conductor and thedielectric is vacuum. We obtain an analytic expression of response voltage and currentaswellastheBLTequationforterminalloadsresponse.And then, an analytical expression for the terminal loads response for the printedlinesradiatedbyplanewaveisderivedandsimulationsforprintedlinesradiatedbysineEM plane wave and NEMP are performed. By the analytical expression, the impact ofthe incident angle and polarization angle of the incident field on the coupling betweenprinted lines and incident field is analyzed. And it shows that once the incident angleand polarization angle meet some relations, voltage and current generated by theincident field coupling with printed lines will be zero, that is, there will be noelectromagneticinterferenceonprintedlinesinthiscase.Finally, an experiment for C-band microwave pulse radiation on an operationalamplifieris performed.Theexperiment result shows that theinterferencevoltageon theoperational amplifier output signal induced by the radiation is close with microwavepulses power density. The re-frequency of microwave pulses also has a significantimpactontheoutputsignal. |
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