针对大型抛物反射面天线中的高功率超宽带馈源,提出一种恒阻抗不平衡-平衡转换结构(巴伦)加切比雪夫渐变线TEM喇叭的馈源设计方法,采用数值模拟研究了其阻抗特性、传输特性与辐射特性,并进行了测试实验。结果表明：该种馈源结构在较小的体积下具有低反射、高带宽和高馈电效率的优点。该馈源已成功应用于大型高功率抛物反射面天线。

A high-power ultra-wideband feed is developed for large parabolic antenna. The feed consists of constant an impedance balun and a Chebyshev tapered transmission line TEM horn, and the impedance characteristics, transmission characteristics and radiation characteristics are studied based on numerical simulation. Then we make some experimental study. The results show that the feed has low reflection, wide band and high radiation efficiency. This feed has been successfully applied to large high-power parabolic antenna.