A. I. Semenikhin1, A. N. Savitskiy2
1, 2 Institute of Radioengineering Systems and Control, Southern Federal University (Taganrog, Russia)

2 savicky@sfedu.ru

The paper studies the peculiar properties of the control of Pancharatnam-Berry (PB) phase for backscattering from two models of cylindrical metasurfaces (CMS). Estimates for the effect of the anisotropy axes orientation and the curvature radius of these models on the polarization conversion of circularly polarized (CP) waves and the PB-phase have been obtained.

The first idealized anisotropic metal-magnetic impedance model of the CMS is specified by the boundary conditions PEC and PMC along the rotated anisotropy axes. The scattering matrix elements of this model (in the bases of linear and circular polarization) versus the rotation angle β of the anisotropy axes and the radius ka have been obtained explicitly.

It has been confirmed that the model implements anti-phase scattering of co-polarized TE and TM waves at any angle β and any radius ka. In the resonance region of ka, the rotation of β is accompanied by anomalies in the amplitudes and phases of CP waves near the angles of 45° and 135°. The anomalies of the linear law of the PB-phase ψPB = ±2β weaken starting from ka > 5. The scattering characteristics of the second full-wave model of the CMS from dumbbell-shaped meta-particles have been examined. The simulation results showed that for it the level of the cross CP-wave increases (in comparison with a similar flat MS).

For the second model, resonance anomalies at β = 45° and β = 135° and small deviations of the PB-phase from the linear law ψPB = = ±2β have been also observed.

Semenikhin A.I., Savitskiy A.N. Control of Pancharatnam-Berry phase of backscattering from cylindrical metasurfaces. Antennas. 2025. № 6. P. 26–35. DOI: https://doi.org/10.18127/j03209601-202506-03 (in Russian)

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