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前言天线是雷达系统的一个重要组成部分,同时也用于许多其他电子设备中。天线起着雷达传输线中被导传输量和自由空间传播能之间的换能器作用。天线将能量集中辐射到目标方向上,并且收集返回雷达的目标回波。天线是用来确定目标角坐标的装置。天线具有空间分辨力,可将一个目标同另一个目标区分开。天线有助于抑制干扰目标检测的杂波信号,它还可建立角度覆盖及确定目标观察时间。
Antennas are an important part of a radar system and are used in many other electronic devices as well. The antenna serves as a transducer between the directed transmission and the free-space propagation in the radar transmission line. The antenna concentrates the energy in the target direction and collects the target echos returning to the radar. Antenna is a device used to determine the target angular coordinates. Antennas have spatial resolution that distinguishes one target from another. The antenna helps to suppress clutter signals that interfere with the target detection. It also creates angle coverage and determines the target observation time.