Single / Dual Broad Band Reflective Type Linear Cross Polarization Converters With Slotted Meander Lines for X / Ku / K Band Applications
Soumik Dey, Sukomal Dey, Shiban K. Koul
Abstract
This paper presents two new compact unit cells for single and dual broadband linear co to cross-polarization conversion. Two metasurfaces are printed on perfect conductor-backed dielectric substrate. The first unit cell consists of slotted rectangular patch with meander line at the center. The structure exhibits a broadband linear cross conversion from 10.63–22.27 GHz (11.64 GHz or 70.8 %) with a polarization conversion ratio (PCR) is > 90 %. The converter response is found incidence angle stable up to 38°. Periodicity of the unit cell is 0.43 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\lambda_{0}$</tex> , where <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\lambda_{0}$</tex> is free-space wavelength. A linear dipole is incorporated in the first structure to realize the second converter with dual broadband characteristics. The design shows <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{PCR} > 80\ {\%}$</tex> from 7.28–10.52 GHz (36.4 %) and from 17.44–24.13 GHz (32.2 %).