A novel cylindrical TE(2,1) mode converter.
A novel cylindrical TE(2,1) mode converter.
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DOI：
10.1063/1.3480994
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发表时间：
2010-09
期刊：
影响因子：
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通讯作者：
D. Constable;X. Fampris;K. Ronald;W. He;C. Whyte;C. Robertson
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文献类型：
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作者：
D. Constable;X. Fampris;K. Ronald;W. He;C. Whyte;C. Robertson
本文设计、制造并测试了一种新型的Ka波段模式耦合器，它能将矩形波导TE（1，0）模转换为圆柱形波导TE（2，1）模。该设计具有一组纵向槽，位于TE（2，1）模式的电流可忽略的区域中，通过抑制基本TE（1，1）模式，允许其传播优先。数值模拟和实验测量显示出良好的一致性，显示出预期的TE（2，1）模式的传输在优于-5 dB的水平，从频率为37.5至41 GHz。随后的远场测量证实了TE（2，1）模式的存在，与分析预期相比，表现出良好的一致性。这种器件对于模式纯度、带宽和易于构造是最重要的并且传输效率是有限关注的应用来说将是理想的候选者。
A novel, compact arrangement for Ka-band mode couplers, which convert a rectangular waveguide TE(1,0) to cylindrical waveguide TE(2,1) mode, has been designed, constructed, and tested. The design features a set of longitudinal slots, positioned in regions of negligible current flow for the TE(2,1) mode, allowing its propagation to be preferentially favored, by suppression of the fundamental TE(1,1) mode. Numerical simulations and experimental measurements display good agreement, showing transmission of the intended TE(2,1) mode at levels of better than -5 dB, from a frequency of ∼37.5 to 41 GHz. Subsequent farfield measurements confirm the presence of the TE(2,1) mode, demonstrating good agreement when compared with analytical expectations. Such a device would be an ideal candidate for an application where mode purity, bandwidth, and ease of construction are of primary importance and where the transmission efficiency is of limited concern.