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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。
The coaxial feed can not only be used as a dual-band feed with good performance, but also can be used to form a differential mode pattern by TEM mode in the coaxial area to realize differential mode tracking. The article first analyzes the electromagnetic field characteristics of the coaxial TEM mode, gives the excitation mode of the TEM mode and its performance, and gives the engineering realization method. Finally, the measured results of the coaxial feed and antenna are given. The correctness of the differential mode performance of the coaxial feed TEM is verified. It is pointed out that the use of the TEM mode difference module to realize the single pulse tracking has the engineering application value.