System‐level SPICE model for predicting the effects of external incident EMI on a shielded communication system with an antenna

Abstract

A system‐level SPICE model is proposed to predict the effects of external incident electromagnetic interference (EMI) on a shielded communication system with an antenna in this study. First, hybrid techniques are incorporated to develop a frequency‐domain equivalent circuit model for the electromagnetic (EM) coupling of the system. The system is divided into an external subsystem and an internal subsystem. A receiving equivalent circuit model is established using the Lorentz reciprocity theorem for the EM coupling of the external subsystem. A transmission equivalent circuit model is established using the segmentation method for the signal transmission in the internal subsystem. Then, in order to handle the non‐linear or time‐varying circuit devices in the system, the macromodelling technique is employed to convert the frequency‐domain equivalent circuit model into a time‐domain system‐level SPICE model. Both numerical simulation and experimental verification are carried out to validate the proposed model. Based on the system‐level SPICE model, bit error rate is calculated to evaluate the performance of the communication system under external incident EMI in the ADS simulator.

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

“…Several efficient numerical methods based on transmission line (TL) equations, such as Baum–Liu–Tesche (BLT) equation, 1–4 FDTD‐SPICE method, 5–9 FDTD‐TL method, 10–11 and so forth, have been proposed for the coupling analysis of transmission lines. These methods can achieve the computation results with the same precision of that computed by the full‐wave algorithms, and the transmission lines do not need to be meshed in these methods directly.…”