Abstract: In modern electronic countermeasures, issues such as electromagnetic incompatibility and high resource consumption are caused by the independent implementation of various functions. To address these issues, detection and jamming capabilities are simultaneously achieved by integrated waveforms based on time-frequency sharing, and thus detection and jamming are integrated at the signal level, which significantly enhances the resource utilization efficiency of the system. In this paper, based on the intercepted adversary′s radar signal parameters, a random phase encoding signal in the same frequency band is generated by the local system from the perspective of time-frequency sharing, which modulates the adversary′s signal using agile modulation techniques. Therefore, an integrated signal based on random phase encoding agile modulation is designed, which can not only detect the target but also interfere with the adversary radar, and excellent performances in both detection and interference are demonstrated. Furthermore, the correlation between the integrated signal and the adversary′s signal can be regulated by adjusting the agile modulation parameters to achieve the desired detection and interference effects. Field experiments based on the integrated system′s operational scenarios have validated the performance of the random phase encoding agile modulation integrated signal and the influence of agile modulation parameters.