混合模介质加载圆锥喇叭的传播和辐射特性

Propagation and Radiation Characteristics of Dielectric Hybrid Mode Conical Horns

本文利用圆柱波导模型导出了混合模介质加载圆锥喇叭的特征方程和平衡混合条件公式，并给出了其口径场和远区辐射场公式。应用所导出的公式分析了该喇叭的传播和辐射特性，给出了一些有意义的设计曲线。分析结果表明该喇叭可以支持ＨＥ‖平衡混合模，并能在一个很宽的频带内产生轴对称的辐射方向图、低交叉极化和低旁瓣等优良性能。因此，混合模介质加载圆锥喇叭在性能上可以与波纹喇叭相比美，特别是在毫米波频段，它更显示了结构简单。

The characteristic equation and balanced hybrid condition formula of dielectric hybrid mode conical horns are derived by making use of the circular cylindrical waveguide model. The formulas of the horn aperture fields and radiated far fields are also given. The propagation and radiation characteristics of the horn have been analyzed by using the formulas given in this paper. Some significant design curres are given. The horn can support the balanced hybrid HE‖ -mode, and exhibits circularly symmetric radiation patterns, low cross polarization, and low sidelobes over a wide frequency range. Therefore, the horn can compare with the corrugated horns in performance. Especially, in millimeter wave frequency bands, it shows simpler structure, easier to manufacture, and lower production costs.