一种新颖的圆极化波导阵列天线设计

介绍了一种新型的Ku波段赋形圆极化波导缝隙阵列天线设计,采用矩形波导宽边纵向直缝隙耦合馈电四脊方形开口波导实现了波导天线的圆极化工作;采用波导窄边耦合器形式的功分器和配相波导组成的馈电网络,控制各线阵的幅度和相位,利用幅度和相位加权的方法实现了圆极化波导天线的波束赋形工作。基于项目需求设计、加工了一套24×16单元天线阵列,测试结果表明,该天线在3%的频段内轴向轴比优于3.0dB、驻波比优于1.6、赋形波束区域覆盖了-40°~0°的范围,满足了项目的指标要求。

Design of a Novel Circular-Polarization Waveguide Antenna Array

In this paper, the design of a novel Ku-band circular-polarized and beam-shaped planer anten- na array is presented. The open quadr-ridged waveguide fed by straight slots cutting in broad wall of rectangular waveguide is used to attain circular-polarization. The waveguide feeding network, which constructed by rectangular waveguide side wall coupler shaped power divider and phase compensation rectangular waveguide, is used to control amplitude and phase distribution. It has been applied to obtain shaped beams. A demo array of 24 × 16 elements is designed, manufactured and tested. The experimental results show that the bandwidth of VSWR〈1. 6 is 3%, and the AR level is below 3.0dB. The measured area of shaped beam pattern is -40°-0°.