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Characterization of mode conversion in oversized rectangular waveguide at 26.5–40 GHz

机译：26.5-40 GHz的超大矩形波导模式转换的表征

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Mode conversion losses are a big concern when an oversize rectangular waveguide is used to minimize ohmic losses. Oversized waveguide components [1] can be used to minimize ohmic losses when a signal must be transported over a large distance. The waveguide devices at both ends are usually in a smaller and connected by suitable transitions to the overmode waveguide. This combination forms a resonant cavity for higher order modes. We examine how the transmission of the fundamental mode is affected by resonances in the higher order modes. We present the design and simulation results of Transition and Bends. Waveguide bends are known to induce coupling between modes. We could not find in literature a comprehensive set of numerical results in a form suitable for practical applications. This motivated us to produce such a set of results, and to analyze practical consequences, including overmode trapping between waveguide transitions. [2] All the components were simulated using the CST microwave studio [3]. First we have designed the transition and simulated in CST environment. Which gives dips in insertion loss due to the spurious overmode. After that the oversized E and H plane bend were designed and simulated to overcome the coupling between the overmodes.
机译：当使用过大的矩形波导来最小化欧姆损失时，模式转换损耗是一个重要的问题。超大波导部件[1]可用于最小化当必须在大距离上运输信号时最小化欧姆损耗。两端的波导器件通常在较小并且通过适当的转换到过度码波导。这种组合形成了高阶模式的谐振腔。我们研究基本模式的传输如何受高阶模式的共振影响。我们介绍了过渡和弯曲的设计和仿真结果。已知波导弯曲诱导模式之间的耦合。我们无法在文献中找到一套全面的数值结果，适用于实际应用。这激励我们制作了这样的结果，并分析了实际后果，包括波导转换之间的过度介陷。 [2]使用CST微波工作室进行模拟所有组件[3]。首先，我们设计了在CST环境中的过渡和模拟。由于虚假的超导，这为插入损耗提供了倾斜。之后设计并模拟过大的E和H平面弯曲以克服过度码之间的耦合。

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