We have extended the method for modeling the stochastic EM near-field which has already been described for stationary stochastic fields to the case of cyclostationary fields. Areas of application are the modeling of the electromagnetic interference radiated by digital circuitry inside the system and also into the environment, where the period of the cyclostationary EMI is given by the clock frequency of the digital circuits. Stochastic electromagnetic fields with Gaussian amplitude probability distribution can be fully described by auto- and cross correlation spectra of the field components. The cross correlation spectra have to be known for the pairs of field components taken at different spatial points (Russer et al., 2015a, b). We present methods for measurement and evaluation of stationary and cyclostationary stochastic electromagnetic fields. The radiated electromagnetic interference (EMI) of electronic circuitry is recorded by two-point measurements of the tangential electric or magnetic field components and by evaluating the field autocorrelation functions and for each pair of field sampling points also the cross correlation functions (Russer and Russer, 2015). In case of digital circuitry clocked by a single clock pulse, the generated EMI is a cyclostationary process where the expectation values of the EMI are periodically time dependent according to the clock frequency and which have to be considered in modeling the EMI. In this contribution we present the experimental characterization of cyclostationary radiated EMI by two-point correlation measurements. The radiated EMI is measured simultaneously by two field probes. The measured signals are recorded by a digital sampling oscilloscope and the cyclostationary auto- and cross correlation spectra are computed from the measured data. From this the propagation of the radiated EMI is computed using the CTLM method (Russer et al., 2016). References Russer, J. A. and Russer, P.: Modeling of Noisy EM Field Propagation Using Correlation Information, in IEEE Transactions on Microwave Theory and Techniques, 2015. Russer, J. A., Russer, P., Konovalyuky, M., Gorbunova, A., Baev, A., and Kuznetsov, Y.: Analysis of Cyclostationary Stochastic Electromagnetic Fields, in: International Conference on Electromagnetics in Advanced Applications (ICEAA), 2015 Russer, J. A., Russer, P., Konovalyuky, M., Gorbunova, A., Baev, A., and Kuznetsov, Y.: Near-Field Propagation of Cyclostationary Stochastic Electromagnetic Fields, in: International Conference on Electromagnetics in Advanced Applications (ICEAA), 2015, 2015. Russer, J. A., Cangellaris, A., and Russer, P.: Correlation Transmission Line Matrix (CTLM) Modeling of Stochastic Electromagnetic Fields, 10 in: Proceeding of: IEEE International Microwave Symposium, IMS, San Farncisco, CA, USA, 2016.
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