本振对多通道接收机相位一致性的影响

Influence of Local Oscillator on Phase Consistency of Multi-channel Receiver

独立本振的多通道接收机中,本振贡献的中频相位差来源于锁相环中的参考分频器。通过计算推导,得出了本振输出相位差与分频后参考时钟相位差以及环路分频比之间的关系,对于认识多通道接收机通道间相位差的成因和采取针对性的消除措施有指导意义。

In the multi-channel receiver with independent local oscillator, the IF phase difference contributed by a local oscillator roots in the using of the reference divider in the PLL.This paper discusses the relationship between the phase difference of the LO outputs , the phase difference of the divided reference clocks and the frequency division ratio of the loop.The conclusions can help understand the cause of formation of the IF phase difference in the multi-channel receiver, and direct how to remove them.