Efficient Method For Field Coupling To Nonuniform Transmission Line Using Cascaded Spice Model

This paper presents a method of equivalent cascaded SPICE model for external field coupling with nonuniform transmission line. Two nonuniform transmission lines excited by an external EMP with different incidences have been studied to validate its accuracy and efficiency. The results show that the induced voltages obtained by the proposed method agree well with those via the software CST even when the segment number is up to three and the proposed method has higher efficiency. Due to the application of SPICE model and directly computation in the time domain, this method allows for the analysis of nonuniform transmission line terminated with nonlinear loads and integrated circuits.