QR Codes 2022 - In this invited paper, the theory of quick response (QR) coded metasurfaces along with the realization of such kind of metasurfaces will be presented to the audience. The proposed metasurfaces can achieve more than 10-dB of RCS reduction over wide frequency band. The proposed 1-bit QR-coded metasurfaces can be designed without the need for any complicated and/or time-consuming algorithms to obtain the 1-bit phase distribution map required for low scattering and significant RCS reduction. The 1-bit phase coding sequence of the QR coded metasurfaces were generated using 1-bit QR code generator in MATLAB which are fast and efficient. It will be shown in this talk that a metasurfaces with their unit cells individual phase assigned according to 1-bit QR codes, are very powerful in achieving more than 10-dB RCS reduction with low-level diffusive scattering patterns. At microwave frequencies, 25 × 25 unit cells QR coded metasurface was designed with 1-bit phase distribution being similar to the QR code of the sentence “Radar Cross Section Reduction”, and more than 10-dB RCS reduction is preserved from 13.3 GHz to 24.5 GHz. At millimeter waves, 25 × 25 unit cells 1-bit metasurfaces were designed and their 1-bit phase distributions being same as the 1-bit QR codes of the words “Metasurface” and “IEEE” and more than 10-dB RCS reduction is preserved from 60 GHz to 120 GHz. It will be shown that such class of QR coded metasurfaces would reduce the design complexities associated with the conventional coding metasurfaces. The invited talk then will conclude with a discussion, design problems, and future challenges related with the proposed QR coded metasurfaces.

nov

Xiamen, China

https://ieeexplore.ieee.org/document/10069818/