Coupling analysis of penetrated wire connecting two electronic devices using a time domain hybrid method

Abstract

An efficient time domain hybrid method is proposed, which integrate transmission line (TL) equations, finite‐difference time‐domain (FDTD) method, Norton and Substitution theorems together, to predict the EM fields coupling with the penetrated wire connecting two electronic devices. Within this method, the geometry of penetrated wire is divided into external and internal TLs according to the shielded enclosures of two devices firstly. Then the equivalent circuit model of penetrated wire is established by the Norton and Substitution theorems, which can represent the discontinuity of impedance between external and internal TLs and the transmitting of interference signals between terminal loads of the wire. Finally, the TL equations combined with FDTD method is utilized to compute the transient responses on external and internal TLs respectively. Numerical simulations of penetrated wire connecting two shielded enclosures in different environment are employed to verify the accuracy and efficiency of the presented method.

Time Domain Coupling Analysis of the Transmission Line Excited by the Leakage EM Fields from the Integrated Circuit with Shielded Enclosure

“…Leakage EM fields generated by the IC will propagate in the outer space of the device and act on the TL to induce interference signals. To avoid meshing the fine structure of the TL directly, some efficient field-line hybrid methods have been proposed, such as Baum-Liu-Tesche (BLT) equation [16,17], FDTD-SPICE method [18], and FDTD-TL method [19][20][21][22]. The traditional BLT equation, based on the electromagnetic topology theory, is to construct the relationship matrix between the leakage EM fields and responses on the nodes of the TL.…”