We have extended the method for modeling the stocha stic 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 cyclostationar y EMI is given by the clock frequency of the digital circuits. Stochastic electromagnetic fields with Ga ussian 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 ta ken at different spatial points (Russer et al., 2015a, b). We present methods for measurement and evaluati on of stationary and cyclostationary stochastic electromagnetic fields. The radiated electromagnetic inte rference (EMI) of electroni c circuitry is recorded by two-point measurements of the t angential electric or magnetic fi eld 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 di gital circuitry clocked by a single clock pulse, the generated EMI is a cyclostationary process where the ex pectation 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 char acterization 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 cycl ostationary auto- and cross correlation spectra are computed from the measured da ta. 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 Fi eld Propagation Using Correlation Information, in IEEE Transactions on Microwave Theory and Techniques, 2015. Russer, J. A., Russer, P., Konovalyuky, M., Gorbuno va, 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., Gorbuno va, A., Baev, A., and Kuznetsov, Y.: Near-Field Propagation of Cyclostationary Stochastic Electrom agnetic Fields, in: International Conference on Electromagnetics in Advanced A pplications (ICEAA), 2015, 2015. Russer, J. A., Cangellaris, A., and Russer, P.: Corre lation Transmission Line Matrix (CTLM) Modeling of Stochastic Electromagnetic Fields, 10 in: Proceeding of: IEEE International Microwave Symposium, IMS, San Farncisco, CA, USA, 2016.     «

We have extended the method for modeling the stocha stic 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 cyclostationar y EMI is given by the clock frequency of the digital circuits. Stochastic electromagnetic fields with Ga ussian ampli...     »