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本文叙述一种专为新的试验性广泛卫星和通讯卫星地面站而设计的14千兆赫和30千兆赫行波管。该管耦合腔型的射频线路分割为三段,采用这种线路能最佳地满足它的频率范围的效率要求。每个行波管具有一级降压收集极,借助于电磁铁聚焦电子注,仅用一个鼓风机冷却。 14千兆赫行波管在40分贝增益间可给出大于2千瓦的连续波功率输出,30千兆赫行波管能提供大于400瓦的连续波功率输出,并具有36分贝增益。已测得在广播试验的电视信道范围内群延迟为1毫微秒,在30千兆赫行波管中,调帽/调相变换为50/分贝。
This article describes a 14 GHz and 30 GHz traveling wave tube designed for new experimental wide-spread satellite and communications satellite ground stations. The tube-coupled cavity RF line is split into three sections, using this circuit to best meet the efficiency requirements of its frequency range. Each traveling wave tube with a step-down collector, with the help of electromagnet focusing electronic injection, only a blower cooling. The 14 GHz traveling wave tube delivers more than 2 kW continuous wave power output at 40 dB gain, while the 30 GHz traveling wave tube provides continuous wave power output greater than 400 W with 36 dB gain. It has been measured that the group delay is 1 nanosecond within the broadcast channel of the television trial and the cap / phase modulation is 50 / decibel in the 30 gigahertz traveling wave tube.