摘要
本文基于锁相环原理研制了一个工作稳定、性能优良的L波段频率源。该设计利用锁相环芯片产生L波段的频率信号,并经过可变增益放大、滤波、功分等模块,从而等功率输出两路频率信号。最终测试结果表明:当输出频率为1.4~1.8GHz时,相噪优于-104d Bc/Hz@10k Hz,杂散抑制优于60d Bc。
Based on the principle of phase-locked loop,this paper developed a stable and well-behaved L-band frequency source. phase-locked loop chip was used in this design to produce L-band frequency signal, and the frequency signal is output by two SMA connectors via amplification, filter, power divider. The final test shows that when the output frequency is 1.4 ~ 1.6GHz, the phase noise is better than-104 d Bc/Hz @ 10 k Hz, the spurious suppression is better than 60 d Bc.
引文
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