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①如图所示,焦点的线量分布 R(x)可视为单脉冲矩形波时,显然单脉冲函数的付氏变换 H(ω)因为是偶函数,所以 Sin 项(虚数项)就成为0,因而
(1) As shown in the figure, when the focal point line quantity distribution R (x) can be regarded as a monopulse rectangular wave, it is obvious that the Fourier transform of the monopulse function H (ω) is an even function, so the Sin term 0, therefore