UHF频段双频馈源辐射性能的优化设计

论述了一种由振子和腔体组合的双腔双频组合馈源技术。从基本结构特征出发,分析了双频馈源的工作原理,优化设计了组合模型,给出了辐射方向图的优化计算结果,满足抛物面天线的边缘照射电平要求。给出了实际工程中双频馈源的实测结果,和理论计算结果一致,并应用到50m天线工程中。现场测试结果表明,该天线在UHF频段具有较高效率,验证了该双频馈源的良好性能,说明双腔组合双频馈源具有重要的工程应用价值。

The Optimized Design for Radiation Performance of UHF Band Dual-frequency Feed

An introduction is presented for a feed working in dual frequency band and combined by poles and cavities. On the basis of the configuration characteristic, an analysis is given for the dual frequency band concept and the optimized combination model is also described for the feed, showing the radiated pattern to be able to meet the illuminating level requirement at edge of the reflector. The agreement between the theoretical and measured result shows very well. The feed has been used in the 50m antenna, the better properties of the antenna in the UHF band indicates that the design method given in the paper is of applicable value.