纵槽波纹喇叭的模式算法

Modal Algorithm of Corrugated Horns with Axial Slots

纵槽波纹喇叭是一种结构紧凑、加工方便、成本较低、具有良好辐射性能、易于实现双频共用的馈源。给出了一种计算纵槽波纹喇叭辐射性能的方法。运用模式匹配理论计算喇叭的内场、谱域方法计算喇叭的口面反射得出口面场,然后由口面积分法得出其辐射特性。计算结果与测试结果的比较说明该方法是一种概念清晰、简单实用的方法。

Corrugated horns with axial slots are one kind of horns with the merits of excellent radiation performance, compact structure, convenience to machine, low cost, etc. In this paper, an algorithm is presented to compute the radiation performance . The inner-field is analyzed using modal matching theory and the aperture reflection is computed by spectral domain approach. At last the radiation pattern is given through aperture field integral. The eomparisen of computation results with experimental ones indicates that it is a simple and practical method with clear conception.