Abstract
Based on the vector fitting and the controlled sources in HSPICE, the delay extraction-based passive compact transmission-line (DEPACT) macromodeling for a transmission line above a lossy ground is presented. Combined with the equivalent sources of the external electromagnetic fields, the equivalent circuits about the scatted voltages and total voltages are proposed. The simulation results are compared with the inverse Fourier transform method and good agreement is obtained. At the same time, using this approach, the transient response for a transmission line above a lossy ground with nonlinear terminations excited by the external electromagnetic fields could be obtained easily and accurately.
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