Mode-Difference-Based Vortex Microwave Photon Anti-Chaff-Jamming Radar

In the battlefield against electromagnetic counter-measures, it has become a research hotspot to counter chaff jamming and improve the detection performance of radar with the help of new dimensions of electromagnetic waves. Intrinsic Orbital Angular Momentum (OAM), as a new dimension in the electromagnetic waves, has been employed in the target imaging and anti-stealth detection. However, the metal chaff has similar echo characteristics under the irradiation of vortex microwave photons and plane waves, and it is difficult to filter out chaff jamming signals only by the electric field strength. For this reason, this paper proposes a vortex microwave photon anti-chaff-jamming detection method based on mode-difference, which effectively detects the target by filtering out the chaff jamming signals through the different characteristics of the target and the metal chaff echo signals in different OAM modes. To verify the effectiveness and correctness of the method, this paper compares the performance of different detection schemes and optimizes the power allocation on different intrinsic OAM modes. The simulation results show that compared with the traditional plane wave and single-mode vortex microwave photon radar, the detection rate of the proposed anti-chaff-jamming scheme has been greatly improved.