FDTD analysis of noise radiation and propagation

The analysis of effects from noise illumination of electrical and electroni c systems is complicated bg stochastic rather than deterministic variables. In this short paper, an analysis technique is presented for noise propagat ion, where the noise is modeled as a time series of discrete time impulses with amplitudes computed by a white Gaussian noise simulation. Using the no ise source to simulate the drive of an appropriate antenna, the analysis of the radiated noise signal is accomplished through the use of the finite-di fference time-domain (FDTD) formulation. The presented technique is verifie d by a comparison with the results obtained from using the method of moment s and a wire antenna radiator. In addition, limitations, stability, and app licability of the presented formulation are discussed.