“Effect of Marguerite” in Scattering Patterns of Cylindrical Digital 1-Bit Anisotropic Metasurfaces

In this paper the “effect of marguerite” (the formation phenomenon of multilobe scattering patterns), which was found in bistatic scattering patterns on cross-polarization upon irradiation of cylindrical digital 1-bit anisotropic metasurfaces (CDAMSs), is investigated. The results of simulation using HFSS of mono- and bistatic scattering diagrams on co-and cross-polarizations in the range from 10 to 18 GHz for various models of CDAMSs are presented. Cylindrical metasurfaces consist of azimuthally coded 1-bit modules (domains) with a small azimuthal size (relative to wavelength) of the modules. Structurally, each module is made of one or two oblique conductive meta-particles in the form of figure-eights, located on a conformal thin shielded substrate. The effect of azimuthal coding of modules on the CDAMSs multilobe scattering patterns formation on cross-polarization in the front half-space is investigated. A physical interpretation of the “marguerite’s effect” mechanism due to the transferring of the scattered field energy to cross-polarization and due to the interference of the cross-polarized anti-phase partial fields is given.