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用FDTD法对船目标的RCS进行了理论计算和分析。为验证计算结果 ,在几个频率上对船目标的RCS进行了测试。在高频段 ,由于回波中可能包含各种干扰 ,如周围环境的反射、地网的损耗等 ,即使有足够强的目标回波 ,也难以测试到较精确的RCS。针对这种问题 ,介绍了一种测试方法 ,该方法消除了外界其他因素的干扰。
The FDTD method is used to calculate and analyze the ship target RCS. To verify the results of the calculations, the ship’s target RCS was tested on several frequencies. In the high frequency range, it is difficult to test a more accurate RCS even though there are sufficiently strong target echoes because the echoes may contain various kinds of interference, such as the reflection of the surrounding environment, the loss of the ground network, and the like. In response to this problem, a test method is introduced, which eliminates interference from other external factors.