【摘要】 基于耦合波理论,对两类半径渐变圆波导TE0n-TE0(n+1)模式转换器进行理论分析、数值计算和仿真模拟.均匀半径渐变波导高功率模式转换器,采用中心频率为17.14GHz、六周期TE02-TE03模式和中心频率为34.30GHz、六周期TE01-TE02模式两种设计参数.非均匀半径渐变波导高功率模式转换器,采用中心频率为34.30GHz、六周期TE01-TE02模式为设计参数.研究的重点在于保证足够转换带宽的情况下,力求最大化模式转换效率和模式纯度.通过理论分析和模拟,这种新型的非均匀半径渐变波导模式转换器在转换效率和带宽方面都明显优于传统的模式转换器,峰值转换效率达99.5%,转换带宽超过1.5GHz.更多还原

【Abstract】 Based on the coupled wave theory, this paper presents the design, numerical analysis, and simulation of two types of TE_ 0n -TE_ 0(n+1) ripple-wall waveguide mode converters: a uniform ripple-wall converter and a nonuniform ripple-wall waveguide converter. For the first type,17.17?GHz,six-period TE_ 02 -TE_ 03 mode converter and 34.30?GHz,six-period TE_ 01 -TE_ 02 mode converter were operative; and 34.30?GHz,six-period TE_ 01 -TE_ 02 for the nonuniform one was operative. The design study is focused on the maximization of the conversion efficiency and mode purity coupled with a broad bandwidth. The nonuniform one seems to have a significant advantage over the uniform one, its conversion efficiency reaches 99.5% at center frequency and has a conversion bandwidth of more than 1.5?GHz. Simulation results agree well with the theoretical predictions.更多还原