Linear-to-Dual-Circular Polarization Decomposition Metasurface Based on Rotated Trimming-Stub-Loaded Circular Patch

Abstract

This paper presents a linear-to-dual-circular polarization metasurface decomposer, which decomposes a linearly polarized (LP) planar incident wave into a pair of circular polarized (CP) waves, namely, a right-handed circular polarized (RHCP) wave and a left-handed circular polarized (LHCP) wave, and scatters them into different directions. The proposed metasurface polarization decomposer is composed of a series of rotated trimming stub loaded circular patches. The two CP components are excited due to the perturbation introduced by the trimming stubs, and the different phase gradients added to the RHCP and LHCP components are realized by rotating the circular patches with different angles. A 12×12 metasurface polarization decomposer is designed, fabricated, and measured, which scatters the RHCP and LHCP into −30∘ and 30∘, respectively. The simulated and measured results agree well with each other, which demonstrates the proposed design.

Keywords

• linear polarization
• left-handed circular polarization
• metasurface
• polarization decomposer
• right-handed polarization
• trimming stubs