超宽带散射信号的时域测量及处理

 叙述了在超宽带电磁脉冲照射下良导电散射体散射信号的时域测量技术及数据处理方法。描述了产生散射信号的物理过程，散射信号的时域测量步骤、提取方法以及散射体冲激响应的计算方法。通过对铝金属球体散射信号的测量及处理，说明了上述测量技术和数据处理方法是有效的，基本满足逆散射成像的要求。

Time-domain measurements and processing of ultra-wideband scattering signal

UWB (ultra-wideband) scattering signal can provide direct observation of time signatures and natural time-gating. This feature is useful in identifying structural response mechanisms and is essential when realizing the inverse scattering target imaging. With the development of UWB pulser and antenna and waveform sampling, the acquisition of UWB scattering signal in time-domain become available gradually. In this paper, the measurement technology in time-domain and data processing method of scattering pulse from the perfect conductive scattered illuminated by UWB electromagnetic pulse is described. The physical mechanism of scattering, the procedure for measurement and distillation of scattering signal and the method of calculating the impulse response of scattering object is also depicted in detail. The measurement system for our UWB scattering pulse (spectrum upper limit less than 1GHz) that is most appropriate to find covered targets is established. The experimental results about aluminum sphere given in the end of this paper demonstrate the effectiveness of the UWB scattering signal measurement system and data processing method.