利用多扇区介质透镜得到TM<sub>01</sub>模激励的圆锥喇叭笔形波束辐射

袁海军; 钟辉煌

强激光与粒子束, 2005, 17 (1): 121, 网络出版: 2006-04-28

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

论文大纲

袁海军钟辉煌

作者单位

国防科学技术大学,光电科学与工程学院,湖南,长沙,410073

圆锥喇叭 TM₀₁模圆极化多扇区介质透镜笔形波束辐射 Conical horn TM₀₁ model Circular polarization Multi-sector dielectric lens Pencil-beam radiation

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, and thickness of each sector is choosed appropriately,then the conical horn can radiate circular polarization pattern with a boresight peak. Radiation fields of the horn are given by analytic formulae and the analytic results agree well with that of numerical simulations,the peak pattern gain of the horn with multi-sector dielectric lens is about 19.6 dB,bandwidth is approximately 15.8%(reflect coefficient S₁₁<0.2),and aperture efficiency is 31.8% at 5 GHz.

参考文献

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袁海军, 钟辉煌. 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[J]. 强激光与粒子束, 2005, 17(1): 121. YUAN Hai-jun, ZHONG Hui-huang. Achievement of pencil-beam radiation from a TM₀₁ mode circular waveguide source using multi-sector dielectric lens[J]. High Power Laser and Particle Beams, 2005, 17(1): 121.

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

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