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在具有正交极化H_(11)°波多模圆波导系统中,H_(21)°波的滤除问题至今未见有较重大的进展。本文提出了一种关于波型滤波器的工作原理和设计方案,并根据Bethe小孔绕射理论导出了波型耦合量的近似计算公式,给出了连级多腔滤波器的波型衰耗和主波反射特性的计算方法。实验证实了理论分析和设计的正确性。波型滤波器的主波和高次波型传输特性得到了比较满意的结果。
In the orthogonally polarized H_ (11) ° waveguide multimode circular waveguide system, no significant progress has been made so far in the filtering problem of H_ (21) ° waves. In this paper, a working principle and design scheme of wave filter are proposed. Based on the Bethe diffraction theory, the approximate calculation formula of wave coupling quantity is derived, and the wave attenuation of the multi-cavity filter And the calculation method of the reflection characteristic of the main wave. The experiment confirms the correctness of theoretical analysis and design. The main wave and high order wave transmission characteristics of the wave filter have been more satisfactory results.