大功率回旋管复合多孔径阵列圆形定向耦合器的设计

The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI:10.1109/MMWCST.2012.6238121

Guo Liu, Yong Luo, Jian-xun Wang

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引用次数: 5

摘要

利用松耦合理论，设计了一种复合多孔径阵列圆矩形波导定向耦合器，用于测量回旋管输出功率和监测频谱。通过理论分析和CST微波工作室(CST- mws)仿真，研究了具有切比切夫等半径分布的20孔径定向耦合器的耦合特性。结果表明，该复合分布具有纹波小、指向性强、带宽宽等优点。同时，我们还发现增大孔径厚度和减小孔径半径有利于减弱耦合系数的波动。此外，适当的矩形波导尺寸和阵列最后一个和倒数第二个孔径之间的距离可以有效地提高阵列的指向性。

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Design of a composite multi-aperture array circular directional coupler for high power gyrotron

A composite multi-aperture array circular-rectangular waveguide directional coupler is designed for measuring gyrotron output power and monitoring spectrum with loose-coupling theory. The coupling characteristics of 20-aperture directional coupler with the distribution of Chebychev-equal radius are performed by theoretical analysis and CST microwave studio (CST-MWS) simulations. Results indicate that the composite distribution possesses both the advantages of smaller ripple, higher directivity and wider bandwidth. Simultaneously, we also discover that increasing the thickness and declining the radius of the apertures will be beneficial for weakening the ripple of coupling coefficient. In addition, proper rectangular waveguide size and distance between the last and penultimate aperture of the array can improve the directivity effectively.

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The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology

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