Single-Layer Dual-Band Linear-to-Circular Polarization Converter With Wide Axial Ratio Bandwidth and Different Polarization Modes

By H. Wang, Yujian Cheng. IEEE Transactions on Antennas and Propagation, 2019

164 citations recorded by the source corpus.

A dual-band linear-to-circular polarization converter (LCPC) based on a single-layer dielectric substrate is proposed. The element of the converter consists of two identical metallic layers with a combination of a connected Jerusalem cross (JC) and an “I”-type dipole for each layer. The proposed converter is designed by using an equivalent circuit model (ECM). Left-handed circularly polarized (LHCP) and right-handed circularly polarized (RHCP) beams can be, respectively, generated at <inline-formula> <tex-math notation="LaTeX">${K}$ </tex-math></inline-formula>-band and <italic>Ka</italic>-band excited by a linearly polarized (LP) wave tilted 45° relative to the <inline-formula> <tex-math notation="LaTeX">${x}$ </tex-math></inline-formula>- and <inline-formula> <tex-math notation="LaTeX">${y}$ </tex-math></inline-formula>-directions of the converter. In addition, the converter covers two operation bands for <inline-formula> <tex-math notation="LaTeX">${K}$ </tex-math></inline-formula>-/<italic>Ka</italic>-band satellite communications with high conversion efficiency and low polarization extinction ratio (PER). After full-wave optimization, the proposed converter is fabricated and measured. The measured results show a good agreement with the simulated ones. Even though there exists a tradeoff between the angular stability and the bandwidth of the dual-band LCPCs, the measured axial ratio (AR) remains stable in the lower operation band and a slight fluctuation in the higher band with the incident angle of 20°.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/f44a313e44c043480602dbe994f8deb85d81af22