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本文敍述了在定向无线电接收系统,特别是雷达系统中旁瓣的抵消方法。在雷达系统中,尤其是在单脉冲雷达系统中,希望用旁瓣抵消方法来抑制天线旁瓣辐射方向中的同波接收。以前所用的办法是,采用一种铺助天线系统,它可以是一个单独的铺助天线或是几个天线的组合。该辅助天线系统的复杂程度取决于雷达旁瓣电平,垂直复盖范围,旁瓣交叉极化分量和天线带宽要求。以前所用的铺助天线系统可以是一个或多个全向天线,一个或多个定向天线或是这两种天线的组合。这种定向铺助天线系统应和雷达主天线一起校准并同步转动,或者叠加在雷达主天线的骨架上。
This article describes the sidelobe cancellation method in a directional radio receiving system, especially a radar system. In radar systems, especially in monopulse radar systems, it is desirable to suppress side-lobe reception in side-lobe radiation using sidelobe cancellation. Previously used approach was to use a parabolic antenna system, which could be a single parabolic antenna or a combination of several antennas. The complexity of the secondary antenna system depends on the radar sidelobe level, vertical coverage range, sidelobe cross-polarization components and antenna bandwidth requirements. The previously used antennae system may be one or more omnidirectional antennas, one or more directional antennas, or a combination of both. This directional antenna system should be calibrated and rotated synchronously with the main radar antenna or superimposed on the main antenna of the radar.