An Ultra-Thin Wideband Reflection Reduction Metasurface Based on Polarization Conversion

reduction metasurface is capable of suppressing the radar cross section of a target, which is of great importance in stealth technology. However, it is still a challenge to realize broadband and low-profile simultaneously within a simple design. Here, we experimentally demonstrate an ultra-thin wideband reflection reduction metasurface, which is achieved by utilizing polarization conversion instead of resonant absorption. The simple cut-wire unit cell is adopted to perform efficient cross polarization conversion, which leads to a polarization conversion ratio above 90% ranging from 8.4 to 14.7 GHz. By arranging the 0/1 units in chessboard layout, the reflection reduction reaches 10 dB from 8.1 GHz to 14.6 GHz. Measured results agree well with simulated ones, which validates the effectiveness of the proposed structure. The ratio of thickness to maximum wavelength reaches 0.56 while the relative bandwidth reaches 57.3%, demonstrating an excellent comprehensive performance. Since our structure consists of refractory ceramic materials, it is promising for radar cross section reduction in high temperature environment.

Automated summary

We experimentally demonstrate an ultra-thin wideband reflection reduction metasurface by utilizing polarization conversion instead of resonant absorption. A simple cut-wire unit cell is adopted for efficient cross polarization conversion, achieving a conversion ratio above 90% in a high frequency range. By arranging the units in a specific layout, significant reduction in reflection is achieved. The measured results confirm the effectiveness of the proposed structure, demonstrating excellent comprehensive performance.