V波段圆波导TE_(01)模式激励器

V波段圆波导TE01模式激励器由矩形TE10模式到矩形TE20模式变换器和矩形TE20模式到圆波导TE01模式变换器组成。采用H面(磁面)转弯激励的方式实现矩形TE10模式到矩形TE20模式的变换;根据圆波导TE01模式的场分布特性,引入过模波导实现了矩形TE20到圆波导TE01的变换。计算结果表明设计的激励器转换效率在95%以上;模式纯度在98%以上的相对带宽可达4.2 GHz;其中在43.4 GHz处的最大转换效率为99.08%,纯度为99.20%。

Circular TE01 mode transducer at V-band

In this paper, the V-band circular TE01 mode transducer consisting of a TE10-TE20 mode converter and a TE20-TE01 mode converter is studied. This paper describes a novel TE10-TE20 mode transducer utilizing an H-plane right-angled corner composed of a standard waveguide and an overmoded one. According to the electric field characteristic of the TE0,1 mode, we achieve TE20 rectangular waveguide mode to a TE01 circular waveguide mode by oval-waveguide. The calculation results obtained from the HFSS show that the transducer maximum conversion efficiency could reach 99.08% at 43.4 GHz with a purity of 99.20%，the bandwidth for conversion efficiency beyond than 95% with mode purity over than 98% is about 4.2 GHz. The transducer has high conversion efficiency, simple structure, and it is easy to fabricate. a design can be applied to the low-power test for the high-power microwave devices.