Ultra Wideband Highly Efficient Cross Polarization Conversion Metasurface for Multi-Band Applications

This work proposes a square and circular split ring resonators-based metausrfae structure for stable cross-polarization-conversion (CPC) applications in C, X, Ku, partial K, sub-5G and 6 G bands. The proposed unit cell structure is a promising candidate for applications in advanced communications systems and polarizers due to its wide frequency coverage, angular stability, and ultra-wideband operations. The polarization conversion unit is shown to be converting incident
${x-}$
or
$y$
-polarized EM waves to their cross-polarized components in two wide frequency bands of 5.2–15 GHz and 17.4–19.3 GHz, respectively. The polarization conversion ratio (PCR) reached 100% at resonance frequencies (5.5 GHz, 8.2 GHz, 13.2 GHz, and 18.6 GHz) of realized metasurface. The reported structure maintains angular stability against oblique incident angles (up to 40°) for the 5–15 GHz frequency range.