A Millimeter-Wave Klystron Upconverter With a Higher Order Mode Output Cavity
A Millimeter-Wave Klystron Upconverter With a Higher Order Mode Output Cavity
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DOI：
10.1109/ted.2017.2724581
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发表时间：
2017-09
影响因子：
3.1
通讯作者：
G. Burt;Liang Zhang;D. Constable;H. Yin;C. Lingwood;Wenlong He;C. Paoloni;A. Cross
中科院分区：
文献类型：
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作者：
G. Burt;Liang Zhang;D. Constable;H. Yin;C. Lingwood;Wenlong He;C. Paoloni;A. Cross
由于腔的小尺寸和最大间隙电压与束能量的比率，在毫米波频率范围内制造速调管是具有挑战性的。小尺寸也使得难以生产具有毫米波的许多应用（例如通信和光谱学）所需的输出功率的器件。以更高阶模式操作可以是潜在的解决方案，因为可以使用更大的横向尺寸结构。不幸的是，高阶模腔具有比基模更低的阻抗。本文提出了一种新的解决方案，以克服降低阻抗，利用上变频器，其中所有的腔除了输出腔被设计成工作在高阶模式。为了证明该方法的有效性，两个速调管上变频器的设计。其中一个有六个腔体，目标是在105 GHz时实现约90 W的最大输出功率。第二个速调管上变频器是一个简单的三腔结构设计的快速原型。介绍了三腔速调管上变频器的毫米波测量。
Manufacturing of klystrons in the millimeter-wave frequency range is challenging due to the small size of the cavities and the ratio of the maximum gap voltage to the beam energy. The small dimensions also make difficult to produce devices with the output power required by a number of applications at millimeter wave, such as communications and spectroscopy. Operating with a higher order mode can be a potential solution, as a larger transverse size structure can be used. Unfortunately, high-order mode cavities have a lower impedance than in fundamental mode. In this paper is proposed a novel solution to overcome the reduced impedance by utilizing an upconverter, where all cavities except the output cavity are designed to work in high-order mode. To demonstrate the effectiveness of the approach, two klystron upconverters were designed. One has six cavities aiming to achieve a maximum output power of ~90 W at 105 GHz. The second klystron upconverter was a simpler three-cavity structure designed for quick prototype. Millimeter-wave measurements of the three-cavity klystron upconverter are presented.