论文部分内容阅读
双模行波管是通过转换电子注电流而工作在两种不同功率电平上的一种管子;电子注电压不能明显改变,因为必须保持与慢波电路同步,所以两个电流电平是通过栅极来控制或有时通过提供两个独立阴极来控制。两个输出电平之间的差(分贝)称为脉升比R(Pulse-up ratio R),通常争取的指标是10分贝脉升比。但是,到目前为止这似乎只能在实验室实现。当电子注电流改变时,行波管的增益也发生变化;如果在低次或连续波模式增益是g_2分贝而在脉冲模式是g_1分贝,那么增益变化
A dual-mode traveling-wave tube is a tube that operates at two different power levels by converting electron injection current; the electron injection voltage can not change significantly because it must remain synchronized with the slow-wave circuit so both current levels are passed The gate is controlled or sometimes controlled by providing two separate cathodes. The difference between the two output levels, in decibels, is called the Pulse-up ratio (R), and the usual target is a 10 dB pulse ramp rate. However, so far this seems to only be achieved in the laboratory. The gain of the traveling wave tube also changes when the electron injection current changes. If the gain is g_2 dB in the low-order or continuous wave mode and g_1 dB in the pulse mode, the gain change