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An analog/digital hybrid delay-locked-loop (DLL) phase conjugator (PC) for use in retrodirective array (RDA) applications is proposed, implemented, and measured. Compared with previous phase-locked-loop PC solutions, the proposed DLL PC has a number of unique features that make it superior to previous solutions in many applications. These features include: 1) the ability to hold the phases of conjugated outputs even when input pilots disappear; 2) the ability to track the changing rate of phases of input pilots even when the pilot signals with dynamic phases disappear for a short period of time, i.e., the implemented RDAs can constantly track a moving target for retransmission even when the incoming pilots are not available due to deep channel fading or time division duplex operation; 3) the DLL PC can be flexibly configured as the voltage-controlled phase shifters for the use in traditional phased beam …