ABSTRACT The aim of this work is to analyze the effect of tuning screws located at the cross iris of a dual-mode vacuum filled cylindrical waveguide filter. Dual-mode waveguide filters with and without cross iris screws are designed and manufactured. Their simulation and measurement results are compared. It is clear that the bandwidth of the filter (and also Finite Transmission Zero (FTZ) locations) can be adjusted with cross iris screws. So, design and mechanical production tolerances can be easily compensated depending on the technical requirements.

中文翻译：

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带可调十字光圈的双模滤波器

摘要 这项工作的目的是分析位于双模真空填充圆柱波导滤波器的十字虹膜处的调谐螺钉的影响。设计并制造了带和不带十字虹膜螺钉的双模波导滤波器。比较了它们的模拟和测量结果。很明显，滤波器的带宽（以及有限传输零 (FTZ) 位置）可以使用十字光圈螺丝进行调整。因此，可以根据技术要求轻松补偿设计和机械生产公差。