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介质加载超宽带四脊喇叭馈源

Modern Radar(2019)

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Abstract
针对四脊喇叭馈源在高频区域照射效率急剧下降,进而导致馈源工作带宽受限的问题,文中提出了一种介质加载超宽带四脊喇叭馈源.研究表明:四脊喇叭中央加载的介质棒能够起到稳定四脊喇叭高频区相心位置和展宽高频区波束宽度的作用,从而将原四脊喇叭馈源的工作带宽从5个倍频程扩展到10个倍频程.该馈源反射系数低于-10 dB,用于照射焦径比为0.36的10 m反射面天线,整个频带内天线口面效率高于50%.
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