Simple Design of Broadband Polarizers Using Transmissive Metasurfaces for Dual Band Ku/Ka Band Applications

Abstract

Major challenges affecting polarizers for communication systems include the inability to perform over a wide bandwidth with a simple design. Orthogonal outgoing polarization for polarization-diverse applications and stable performances for oblique incidence angles are also major requirements. This paper presents the design of a polarizer that can perform over a wide range of bandwidths in dual frequency bands. The unit cell is uniquely designed using a split circular ring resonator enclosed in a square ring with the addition of three-square patches. As a result, the incoming linearly polarized x(y) wave is converted into a transmitted LHCP (RHCP) wave in the Ku and Ka bands. The operational bandwidths are 11.05~16.75 GHz (41%) and 34.16~43.03 GHz (23%). The proposed polarizer is ultrathin, works in dual wide-bands, is polarization-diverse, and maintains performance over ±45° and ±30° oblique incidences, which makes it a strong candidate for many communication systems.

Plasma-Based Dual-Band Reflective Surface

“…Even though examples of metasurfaces handling signals in Ka-and V-bands are available in the literature [43], they need to be integrated into arrays of dual-band antennas, increasing the complexity of the overall system. Finally, transmittarrays have been proposed to handle Ku-and Ka-bands simultaneously [44] or K-and Ka-bands [45]. To sum up, the solutions that combine reconfigurability and large frequency ratio, say > 2, are not optimal because of their complexity.…”