SFD-238正交场放大管为相控阵应用而设计,用直流电流工作,频宽为400兆赫,中心频率在3.3千兆赫。如图1所示,规定的峰值高频输出功率极限从最小125千瓦到最大158千瓦,高频输入功率从最小6.5千瓦到最大12千瓦。在最低效率为50％和脉冲宽度为3微秒情况下,管子工作在0.008工作比,产生1千瓦最小平均输出功率。直流电源电压是12.5 The SFD-238 quadrature field-amplifier tube is designed for phased array applications and operates with dc current with a bandwidth of 400 MHz and a center frequency of 3.3 GHz. As shown in Figure 1, the specified peak high frequency output power limit is from a minimum of 125 kW up to a maximum of 158 kW and high frequency input power is from a minimum of 6.5 kW up to a maximum of 12 kW. With a minimum efficiency of 50% and a pulse width of 3 microseconds, the tube operates at 0.008 duty cycle resulting in a minimum average output power of 1 kilowatt. DC supply voltage is 12.5