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中文摘要：
多导体传输线理论分析外场与电缆间的耦合，时域有限差分法（FDTD）模拟通信电缆对外场的时域响应．根据模拟得到的电缆上电压电流的分布，对具有多根导线电缆采用单导线模型做近似处理，并计算了相应的电参数．结果表明，单导线模型处理所得结果和其他方法的结果符合得很好．该结论对实际应用有参考价值．
英文摘要：
The multi-conductor transmission line （MTL） theory was used in the analysis of the coupling between telecommunication cable and external field, the finite-difference time domain （FDTD） method was used to simulate the transient response. According to the results of induced voltages and currents, an approximate single-wire line model replaced the multi-conductor transmission line model and the corresponding electric parameters were calculated in term of the single-wire line model. The result indicates that agreement had been achieved with other method. The effects on induced voltages with simplified single-wire line caused by cable length, electric parameters of the ground and terminated impedance are examined and the results are discussed.
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