This study proposes a new approach to hybrid a circuit and field analysis in order to evaluate the susceptibility of a low-noise amplifier against electromagnetic interference. The proposed method employs an equivalent circuit model for active elements and a full-wave time-domain analysis for the passive parts. To this end, two methods, finite integrated technique and the method of moments, are combined through an innovative algorithm. The output of the suggested hybrid technique is an equivalent circuit model which predicts well the susceptibility of the illuminated low noise amplifier. To validate the model, measurements are performed in an anechoic chamber. The authors will show that the proposed method provides a satisfactory accuracy.
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