在轨功率可调行波管放大器电源设计与实现

Design and Implementation of Power Supply for on-Orbit Traveling Wave Tube Amplifiers with Adjustable Power

传统星载行波管放大器研制完成后饱和输出功率固定,要改变行波管输出功率,只能通过行波管输入功率回退的方法,其最大缺点是行波管的效率随之大大降低,并非真正意义上的在轨功率可调行波管放大器。本文提出并实现了一种在轨功率可调行波管放大器电源,能够与功率可调行波管集成在轨功率可调放大器,实现在轨调节行波管放大器输出功率的功能。其特点在可调输出功率范围内,放大器一直工作在饱和点,输出稳定的射频功率,且具有较高的输出效率,提高卫星能源利用效率。

The saturation output power of traditional space borne traveling wave tube amplifier(TWTA)is fixed since fabrication.To change the output power of TWT,the only way is to back off the input power.The biggest disadvantage of it is that the efficiency of the TWT is greatly reduced,and the device is not a real on-orbit power adjustable TWT amplifier.A power supply is proposed and implemented,which can be integrated with on-orbit power adjustable TWT to realize on-orbit output power adjustable amplifier.The TWTA works at saturation point all the time in the range of adjustable output power.It outputs stable RF power and has high output efficiency,which can improve the energy utilization efficiency of satellite.