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用于高功率空间型行波管的热管,提供了一种把热量从其高度集中的区域散走的有效手段。在收集极和输出电路区域产生的热,通过与底板连成一体的纵向热管和横向热管,被分散到整个管子底板各处。结果,使管内各元件的温度降低了,底板各处的热密度也减小了。本工作的目的是要探索高效率冷却设计方法,并与先前在较低功率空间器件上得到证明的高效率电气设计技术结合起来,从而提高螺旋线空间行波管的功率电平。这些高效率电气设计技术包括:螺旋线电路相速渐变、多级降压收集极、低的介质加载和导电屏蔽加载以及集成管壳聚焦。还介绍了一项把管壳热量转移到底板上去的新技术。这种管子在E波段较低频率上,给出了300瓦连续波高频功率输出,在52％的总效率下,获得了40分贝的饱和增益电平。管子设计中取较低阴极负荷。管子工作时所呈现的温度也较低。
Heat pipes for high power space traveling wave tubes provide an effective means of dissipating heat away from their highly concentrated areas. The heat generated in the collector and output circuit regions is dissipated throughout the tube floor through longitudinal and lateral heat pipes integral with the base. As a result, the temperature of the various components in the tube is reduced and the heat density throughout the floor is also reduced. The objective of this work is to explore efficient cooling design approaches that combine with the high-efficiency electrical design techniques previously demonstrated on lower-power space devices to increase the power levels of helical space-traveling-wave tubes. These high-efficiency electrical design techniques include spiraling phase gradients, multi-stage buck collectors, low dielectric loading and conductive shield loading, and integrated tube and tube focusing. A new technique is also introduced that transfers the heat of the package to the floor. This tube gives a 300 watt CW HF power output at the lower E-band frequency and achieves a 40 dB saturation gain level at 52% overall efficiency. Pipe design to take a lower cathode load. The tube shows a lower temperature while it is working.