A Simple I-Shaped Wideband Linear-Linear and Linear-Circular Reflective Type Polarizer

A wideband angular stable linear-cross and linear-circular reflective type polarization converter has been illustrated in this work. The unitcell comprises a 45° rotated circular-arc based I-shaped resonator printed on top of a thin FR-4 grounded dielectric substrate. The proposed metasurface converts y/x- polarized incidence wave to its cross-polarization in three different frequency ranges: C, X, and Ku-bands. This design can also convert linearly polarized wave into circular polarization in C and Ku-bands along with linear-orthogonal conversion. The response is stable up to 45° (for linear-cross) and 30° (linear-circular) for both oblique incidences (TE and TM). The uniqueness of the design lies in dual-polarization conversion in the same bands and cell compactness with periodicity 0.1539 λ
L
, and 0.0535 λ
L
(λ
L
refers to the longest free-space wavelength of the operational band). Authors strongly believe this design has the potential to be used in real-time application where the dual-polarization conversion (linear as well circular) has the primary need.