用瞬态电磁场测量目标的冲激响应和宽带雷达截面

Measurement of the Impulse Responses and the Wideband RCS of Targets Using Transient Electromagnetic Field

突破传统的时域散射区域技术的限制，采用基于瞬态电磁测试系统的实验性冲激雷达，在实际空间对导体球和导体长椭球进行了瞬态电磁脉冲响应测量，用修正最速下降法由实测瞬态电磁脉冲响应较好地反演了导体球和导体长椭球的冲激响应。提出了时域测量目标宽带雷达截面的瞬态响应法，并用此法测得了导体球、导体长椭球的雷达截面和谐振频率．

The transient electromagnetic pulse responses of a conducting sphere and a conducting prolate spheroid are measured in practical space by the experimental impulse radar,which is based on Transient Electromagnetic Measurement System and breaks through the limitation of traditional Time-Domain Scattering-Range Technology. From the measured transient electromagnetic pulse responses, the impulse responses of the conducting sphere and the conducting prolate spheroid are better inverted using Modified Steepest Descent Method.Transient Response Method for measuring the wideband radar cross-section(RCS)of targets in time domain is presented. Using this method,the RCS and the resonance frequencies of the conducting sphere and the conducting prolate spheroid are obtained.