利用电磁模拟软件, 计算得到了H面渐变与E面渐变的楔形衰减器匹配效果, 指出在相同渐变长度下, E面渐变匹配效果优于H面渐变。H面渐变衰减器反射主要来源于电场集中处, 而E面渐变衰减器主要来源于渐变前部尖端处。在此基础上设计出了一种变形的匹配衰减器, 即在E面渐变衰减器渐变开始处向前延伸一块薄片。计算结果与测试结果表明: 与H面渐变和E面渐变的楔形衰减器相比,所设计衰减器在近截止频率处的匹配效果得到了明显的改善。

H-plane and E-plane tapered wedge-shaped severs were designed and analyzed by electromagnetic simulation software. The result shows that the matching of the E-plane tapered wedge-shaped sever is better, and the reflected electromagnetic wave mostly results from the place of the centralized electric field, i.e. the sharp end of the wedge-shape for both kinds of severs. A deformed sever is designed based on the E-plane tapered severed. The simulation and experiment results show that, the matching of the deformed sever is much better than that of the H-plane and E-plane tapered wedge-shaped severs near the cut-off frequency.