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在球透镜仅实现一维扫描的基础上,通过在另一维上平行放置多层馈源的方式,实现了二维同时扫描。基于坐标变换和GO/PO方法推导了馈源偏移量和波束指向角之间的关系式。该天线由一个均匀介质球透镜和多层平面馈源天线组成。通过同一层上的TSA(渐变缝隙天线)单元之间的切换实现水平面的扫描,而通过不同层上TSA单元之间的切换实现垂直面的扫描。作为在毫米波段的一个应用,研制了一个Ka波段用8×2的TSA单元阵馈电的天线实物。实测结果表明它可以在水平面和垂直面分别达到128°和30°的覆盖。
Based on the fact that the ball lens only realizes one-dimensional scanning, two-dimensional simultaneous scanning is realized by placing multi-layer feed in parallel on the other dimension. Based on the coordinate transformation and the GO / PO method, the relationship between the feed offset and the beam steering angle is deduced. The antenna consists of a uniform dielectric ball lens and a multi-layer planar feed antenna. Horizontal plane scanning is achieved by switching between TSA (Gradient Slot Antenna) units on the same layer, whereas vertical plane scanning is achieved by switching between TSA units on different layers. As an application in the millimeter-wave band, an antenna with a Ka-band TSA cell array of 8 × 2 has been developed. The measured results show that it can reach 128 ° and 30 ° coverage in the horizontal and vertical planes, respectively.