Abstract
Monopulse radar angle measurement technology is crucial for modern missile precision guidance systems due to its high accuracy and real-time capabilities. Cross-eye jamming (CEJ) is recognized as one of the most effective countermeasures against monopulse radar. However, traditional CEJ implementation requires complex amplitude and phase modulation through specialized hardware. The digital coding metasurface (DCM) is an advanced electromagnetic (EM) wave modulation technology. Synchronized modulation of phase and amplitude can be achieved by dynamically adjusting the digital coding state of each individual unit of the DCM. In this paper, a cross-eye jamming method based on DCM is proposed. The EM modulation model of DCM is derived, and it is theoretically demonstrated that cross-eye jamming signals can be generated by two DCMs. The simulation results demonstrate that the method attains more than twice the cross-eye gain when the error of the DCM phase modulation is maintained within 40°.