锁相接收机在微弱信号的接收与解调技术中有重要地位,但在环路的牵引捕获过程中会发生假锁现象。最近,J·P·Mcgeehan 等人提出的分环技术可很好地消除假锁(1)。本文运用谐波平衡法比较清楚地分析了假锁产生的原因,同时对于分环技术消除假锁的机理进行了理论分析,结果表明,分析与实验是一致的,从而表明了分环技术的有效性。 Phase-locked receiver in weak signal reception and demodulation technology has an important position, but in the process of traction loop capture lock will occur false lock phenomenon. Recently, the split-ring technique proposed by JC McGeehan et al. Is a good way to eliminate the false lock (1). In this paper, the cause of false lock is analyzed clearly by harmonic balance method. At the same time, the theoretical analysis of the mechanism of eliminating false lock by sub-ring technology is carried out. The results show that the analysis and experiment are consistent, which shows the effectiveness of sub-ring technology Sex.