Dynamic radar jamming metasurface with amplitude and phase modulation

Abstract

In this paper, a 1-bit coding metasurface comprised of 20 columns is proposed to achieve amplitude and phase modulation. Each column is dynamically controlled by p-i-n diodes to modulate the incident electromagnetic waves. By synthesizing the code sequence, the radar cross section (RCS) of the surface can be reduced to specific values. With shift coding and inverse code sequence, the metasurface can also achieve phase modulation function with almost the same amplitude responses. A metasurface prototype is fabricated and measured, showing an obvious RCS reduction in a 35.2 percent bandwidth from 7-10 GHz. Specifically, a high RCS reduction of 23 dB can be achieved at 8.5 GHz. In addition, the metasurface exhibits the capability of phase modulation with responses of 60°±15° and 140°±30° , while the amplitude responses are almost the same. Overall, the proposed dynamic metasurface is useful for radar jamming, which is expected to further improve the stealth performance of the target.