中文说明:应用背景 airborne radar clutter simulation反映了杂波的非均匀特性相控阵雷达的天线阵面也由许多个辐射单元和接收单元(称为阵元)组成,单元数目和雷达的功能有关,可以从几百个到几万个。这些单元有规则地排列在平面上,构成阵列天线。利用电磁波相干原理,通过计算机控制馈往各辐射单元电流的相位,就可以改变波束的方向进行扫描关键技术每个天线单元除了有天线振子之外,还有移相器等必须的器件。不同的振子通过移相器可以被馈入不同的相位的电流,从而在空间辐射出不同方向性的波束。天线的单元数目越多,则波束在空间可能的方位就越多。这种雷达的工作基础是相位可控的阵列天线,“相控阵”由此得名。相位控制可采用相位法、实时法、频率法和电子馈电开关法
English Description:
Application backgroundAirborne; radar clutter simulation is a reflection of the antenna array of the clutter. The antenna array is composed of a number of radiating elements and a receiving unit (called array element). These cells are arranged regularly in a plane, which constitutes an array antenna. By using the principle of electromagnetic wave coherence, the phase of the current of the radiation unit is controlled by computer, and the direction of the beam can be changed.Key Technology