Research on scattering characteristics of electromagnetically modulated corner reflectors

The corner reflector is a common passive jamming device with a wide angular domain and is often used to protect critical targets. However, conventional metallic corner reflectors have fixed characteristics, and new electromagnetic materials are needed to optimize the characteristics of corner reflectors. Adaptive frequency selective surface (AFSS) is a new type of structure with adjustable electromagnetic characteristics by loading a series of variable active devices between cells. In order to expand the scope of application of the corner reflector and to analyze the scattering characteristics of the electromagnetic material corner reflector for better protection of critical targets, this paper designs an electronically controlled corner reflector based on a single-surface AFSS, and the scattering characteristics of the electronically controlled corner reflector are analyzed by simulation calculations. The simulation results show that the scattering characteristics of the designed electronically controlled corner reflector can be flexibly regulated, i.e., different bias currents under the AFSS unit have different reflecting effects on the incident electromagnetic wave energy; at the same time, it verifies the wide-angle domain characteristics of the electromagnetic regulated corner reflector, and its regulated angular domain in the azimuthal direction and the pitch direction is greater than 60°, which achieves the effect of real-time control of wide-angle domain based on the passive scatterer. Compared with the traditional corner reflector and planar electromagnetic material, it has both real-time regulation and wide-angle domain characteristics, which expands the application scenario and scope of the corner reflector.