非赋形双偏置高性能椭圆波束天线

分析了非赋形双偏置天线产生椭圆波束的机理,将馈源的椭圆波束照射到轮廓线为椭圆形的付反射面上,通过双偏置天线的对称转换原理,主反射面产生椭圆波束.馈源波束由矩形口径的多模喇叭产生,它提供了等化的方向图.给出了馈源及天线的方向图计算公式.实验结果表明,实测方向图基本与理论计算一致.与其他类型的椭圆波束天线相比,本天线加工简单,同时天线效率也较高.

Unshaped dual offset ellipsoidal beam antenna with high performance

Based on the principle of symmetrical transition of dual offset antenna, let the beam of the feed irradiate the ellipsoidal subreflector, a ellipsoidal beam can be produced by the main reflector of an unshaped dual offset antenna. In this paper, the feed is designed as a rectangle multimode horn with equal radiation patterns. The analytical expressions for calculating the patterns of the feed and antenna are presented. A better agreement between the experimental results and calculated patterns is obtained. Compared with other ellipsoidal beam antennas, the new antenna has the characteristics of higher efficiency and simplicity of fabrication.