有始有终信号在损耗介质中传播的研究

Discussion on Propagation of StartStop Signals in a Dissipative Medium

研究非正弦电磁波在损耗介质中传播的理论，对分析隐身技术中脉冲波的吸收等问题有理论指导意义。采用拉普拉斯变换可求出有始有终电场信号激励下，电磁波在损耗介质中传播时，电场强度的暂态解。利用高斯积分法及数组移位技术计算出雷达技术中所用的有限周期的方波脉冲和正弦脉冲在线性损耗介质中传播时，电场强度的波形变化。文中给出了一个计算实例，并分析了波形产生变化的规律及原因。

Studying the propagation of nonsinusoidal wave in a dissipative medium is theoretically important for analyzing the problems on absorbed pulse waves in hidden techniques. The transient solution of electric intensity in dissipativ medium propagation is derived by using Laplace transform in which the excitator is a startstop electric signal. Waveform variation of electric intensity in a linear dissipative medium propagation is calculated where excitators are some finite periodic rectangular pulses and sinusoidal pulses that are often used in radar techniques. A calculating example is given. The regulation and reason of the wave form variation are also analyzed.