Solid-state amplifier pushes 400 W at 500 MHz

The present discussion is concerned with the development of a transistor amplifier which provides 400 W power output in the frequency range from 100 to 500 MHz. Several technologies were combined to achiieve this output power and to satisfy the stringent requirements of the jamming systems in which this amplifier type is to be used. Attention is given to the design of the output power stage, the matching of the power modules in gain and phase, the ability of the device to withstand worst-case physical and electrical stress, the achievement of a submillisecond response, the solution of the heat dissipation problem, and approaches used for increasing fatigue life of the structure.