一种旁瓣匿影天线系统设计

旁瓣匿影是相控阵雷达采用的一种典型抗干扰技术。天线系统是旁瓣匿影的核心硬件设备,其设计直接关系到匿影波束能否有效压制干扰信号。针对目前旁瓣匿影容易出现的波束覆盖穿刺等问题,文中设计了一种旁瓣匿影天线系统,它包括全向匿影天线、低噪放耦合模块。通过匿影天线与低噪放集成设计提高匿影链路的干噪比。全向匿影天线采用方位全向双极化天线设计,水平极化匿影天线采用扁波导缝隙全向天线,垂直极化匿影天线采用扁平双锥全向天线。仿真结果表明,两种天线可实现方位向水平极化与垂直极化的全向覆盖。经实测验证,匿影波束能完整覆盖主天线副瓣区,可有效提升雷达系统的抗干扰能力。

Design of a Sidelobe Blanking Antenna System

Sidelobe blanking is widely used as a typical anti-jamming technology of phased array radar. As the core hardware equipment of side lobe blanking, the design of side lobe blanking antenna system is directly related to whether the blanking beam can effectively suppress interference signals. To solve the problem of beam covered leakage, a side lobe blanking antenna system is designed in this paper. The blanking antenna system includes omnidirectional blanking antenna and low noise amplifier coupling module. Through the integrated design of blanking antenna and low noise amplifier, the interference noise ratio of blanking link is improved. Omnidirectional blanking antenna adopts omnidirectional dual polarization antenna design. Horizontal polarization blanking antenna adopts flat waveguide slot omnidirectional antenna, and vertical polarization blanking antenna adopts flat biconical omnidirectional antenna. Simulation results show that the two antennas can achieve omnidirectional coverage of azimuthal horizontal polarization and vertical polarization. Finally, the actual measurement shows that the blanking beam can cover the main antenna sidelobe area completely, thus effectively improving the anti-jamming capability of the radar system.