Abstract: On the basis of the generalized phase conjugation condition, the principles of phase-conjugating arrays（PON） is theoretically studied and derived. The principles and the advantages and disadvantages of two typical PONantenna array of the realization of phase conjugation are analyzed and discussed. The far field expressions ofphase-conjugating arrays are theoretically derived. The RF leakage coefficient is first proposed, and discussed the RF leakage coefficient on the impact of retrodirective far field. It lay a foundation for the further research of the retrodirective antennaarray..