分析了带交叉接头的双模馈源，分析和计算了收、发状态下偏置反射面天线的辐射场和焦区场，讨论了馈源位置误差，设计和测试了高效偏置反射面天线．实测结果与预计结果一致，达到预期的高效率．该天线适用于卫星电视接收站． The dual-mode feed with cross-joint is analyzed, and the radiation field and the focal field of biased reflective antenna are analyzed and calculated. The position error of the feed is discussed, and the design and test of high-efficiency bias reflective antenna . The measured results are consistent with the expected results, to achieve the desired high efficiency. The antenna is suitable for satellite TV receiving stations.