利用多扇区介质透镜得到TM01模激励的圆锥喇叭笔形波束辐射
Achievement of pencil-beam radiation from a TM01 mode circular waveguide source using multi sector dielectric lens
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摘要: 给出了一种改善TM01模辐射特性的方法，由不同厚度的扇区组成的介质透镜放置于圆锥喇叭口径处，适当地选择各个扇区的厚度，从而产生圆极化的轴向为极大值的远场方向图。推导出了该天线辐射场的解析公式，解析结果与数值模拟有较好的吻合。当工作频率为5 GHz时，天线的增益达19.6 dB，口径效率31.3%，具有15.8%的带宽(反射系数S11<0.2), 且适合于高功率辐射。Abstract: A method of improving radiation from TM01 model conical horn is presented, drielectric lens consisted of a number of sectors locates on aperture plane of conical horn, appropriate thickness of each sector is choosed ,the conical horn can radiate circular polarized pattern,with a boresigh peak . Radition fields of the horn are gived by analytic formulae and analytic results agree well with that of numerical simulations ,the geak pattern gain of the horn with multi-Sector dielectric lens is about 19.6dB,bandwidth is approximately 15.8%(S11<0.2),aperture efficiecy is 31.8% at 5GHz．
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Key words:
- tm-01 model /
- conical horn /
- circular polarized /
- multi-sector dielectric lens /
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