A coaxial control technique is proposed for iteration synthesis of axis-perturbed mode converter, and a W-band TE ₀₁ -to-TE ₁₁ mode converter is designed by the improved iteration method. Optimizing the curvature instead of the axis, the iteration method has a fast convergence and a possibility of multifrequency design but cannot assure that the output port aligns with the input port. A cosine correction of curvature deduced from the intermediate parameter is introduced to align the input port to the output port and avoid influencing the normal vector of the input port and the output port. A conversion efficiency over 95% is achieved by the designed TE ₀₁ -to-TE ₁₁ mode converter from 87.4 to 102 GHz (the relative bandwidth 15.4%). As a validation, a conversion efficiency approximately 90% is obtained according to S-parameters measurement, and a high pure circular TE ₁₁ mode output is demonstrated by near-field scanning.

中文翻译：

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轴扰模转换器迭代综合中的同轴控制

提出了一种同轴控制技术用于轴扰模式转换器的迭代合成，并采用改进的迭代方法设计了W波段TE ₀₁ -to-TE ₁₁模式转换器。优化曲率而不是轴，迭代方法具有快速收敛和多频设计的可能性，但不能保证输出端口与输入端口对齐。引入从中间参数推导出的曲率余弦校正，使输入端口与输出端口对齐，避免影响输入端口和输出端口的法向量。设计的 TE ₀₁ -to-TE ₁₁实现了 95% 以上的转换效率 模式转换器从 87.4 到 102 GHz（相对带宽 15.4%）。作为验证，根据 S 参数测量获得了大约 90% 的转换效率，并且通过近场扫描证明了高纯圆形 TE ₁₁模式输出。