未来雷达系统要求使用频率捷变发射机,能产生脉间频率捷变和脉冲内调相的复杂波形,同时发射机与本振具有良好的相位相干特性及稳定性,为此开发了先进频率信号发生器。介绍了L波段频率合成器的原理,给出了有关的电路环节,利用锁相及锁频技术进行了频偏处理,也对位频器和调相器作了介绍。 Future radar systems require the use of frequency agile transmitters that generate complex waveforms of inter-pulse frequency agility and in-pulse phase modulation, while the transmitter and local oscillator have good phase coherence and stability. For this purpose, advanced frequency signals generator. The principle of the L-band frequency synthesizer is introduced, the relevant circuit steps are given, the frequency deviation processing is performed by using the phase locking and frequency locking techniques, and the frequency conditioners and phase modulators are also introduced.