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本文运用Volterra级数分析了双频谐波雷达作用下非线性散射体,将电磁场问题化为网络问题。描述了在正弦输入下无须通过FFT技术即可从频域解获得时域解的步骤。通过对散射功率的测量,非线性散射体电流—电压特性得到近似,并用于预测非线性散射体在不同交调响应时的散射功率。为双频谐波雷达探测非线散射目标和隐身目标提供理论与实验依据。
In this paper, we analyze the nonlinear scatterers by the double-frequency harmonic radar with Volterra series, and transform the electromagnetic field problem into a network problem. Describes the steps of obtaining the time-domain solution from the frequency domain without the use of FFT techniques at sinusoidal input. By measuring the scattering power, the current-voltage characteristics of the nonlinear scatterers are approximated and used to predict the scattering power of the nonlinear scatterers at different acoustical responses. It provides theoretical and experimental basis for detecting non-linear scattering targets and stealth targets in dual-frequency harmonic radar.