We show that the radiation patterns of two-dimensional systems in the form of arrays depend on the duration of the emitted pulses. To study such systems, we propose to use the correlation length depending on the pulse duration and the emission direction. The obtained formula for the length of correlation in two-dimensional systems is convenient for description of distortions in the radiation patterns, which are caused by shortening the duration of the emitted pulses. In this paper, we consider the effect of suppression of side lobes in radiation patterns. This is a general effect, since it is related to the delay of signals from different parts of the emitting system. In particular, it is observed in optical systems of the diffraction grating type, in which a decrease in the intensity of diffraction maxima in the case of pulse duration shortening can be used as the basis for a new method of estimation (or measurement) of the duration of optical pulses.

中文翻译：

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抑制短脉冲辐射系统辐射模式中的旁瓣

我们表明阵列形式的二维系统的辐射模式取决于发射脉冲的持续时间。为了研究此类系统，我们建议使用取决于脉冲持续时间和发射方向的相关长度。得到的二维系统相关长度公式便于描述由于发射脉冲持续时间缩短而引起的辐射方向图畸变。在本文中，我们考虑了辐射方向图中旁瓣抑制的影响。这是一般效应，因为它与来自发射系统不同部分的信号延迟有关。特别是在衍射光栅类型的光学系统中观察到，