| 摘要: |
| 本文给出了在电尺寸很大的理想导体光滑凸表面上,无限小磁矩或电矩在空间产生的电磁场的近似渐近解,利用该解可以准确有效地计算凸表面上天线间的互耦。此解中,表面塌沿Keller的表面射线路经传播,且在阴影边界过渡区域,包括对于源的邻城,它们仍然一致适用。除此之外,在给出的解中,通过一个系数T/K给出了关于表面场的表面射线绕曲的影响,其中,T表示表面射线的绕曲,K表示射线方向上的表面曲率。该解是由简单的典型问题的近似解导出的。给出了圆柱面和圆锥面上裂缝间互耦的数字结果,它与实验结果相吻合。 |
| 关键词: 天线 互耦 射线分析法 电磁波传播 |
| DOI：10.3969/j.issn.1001-893X. |
|
| 基金项目: |
|
| Ray analysis of mutual coupling between antennas on a convex surface |
|
| () |
| Abstract: |
| An approximate asymptotic solution is presented for the electromagnetic
fields which are induced on an electrically large perfectly conducting smooth convex
surface by an infinitesimal magnetic or electric current moment on the same surface.
This solution can be employed to calculate the mutual coupling between antennas on a
convex surface in an efficient and accurate manner. In this solution, the surface fields
propagate along Keller's surface ray paths, and their description remains uniformly
valid within the shadow boundary transition region including the immediate vicinity
of the source. Furthermore, the effect of surface ray torsion on the surface fields is
indicated in the present solution, through a factor T/k, where T denotes the surface
ray torsion and k is the surface curvature in the ray direction. This solution is deduced
from the asymptotic solutions to simpler canonical problems. Numerical results for the
mutual coupling between slots in cylinders and cones are presented, and are shown
to compare very well with experiments. |
| Key words: Antennas,GTD,Conformal Arrays,Electromagnetic Surface Wave Propagation |
《电讯技术》编辑部 