同轴馈源TEM模差模性能分析

Analysis of Performance of TEM Difference-mode of Coaxial Feeds

同轴馈源不仅可作为性能优良的双频段馈源,还可利用同轴区域的TEM模形成差模方向图,实现差模跟踪。该文章首先分析了同轴馈源TEM模的电磁场特性,给出了TEM模的激励形式及其性能,并给出了工程实现方法。最后给出同轴馈源及天线的实测结果,验证了同轴馈源TEM模实现差模性能的正确性,并指出利用TEM模差模实现单脉冲跟踪具有工程应用价值。

Coaxial feeds can be not only good dual band feeds, but also can form the difference-mode pattern by use of the TEM mode in the coaxial zone. Firstly, the electromagnetic fields of the TEM mode in the coaxial feeds are analyzed, then the performance of the coaxial feeds is analysized when inspired by different modes, and the engineering project is provided to form difference-mode patterns. Finally, the measured results are given to validate the design method, and the point is proposed that monopulse tracking by use of TEM mode will have engineer value.