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Tri-band high-efficiency circular polarization convertor based on double-split-ring resonator structures
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Tri-band high-efficiency circular polarization convertor based on double-split-ring resonator structures
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Journal Article
Tri-band high-efficiency circular polarization convertor based on double-split-ring resonator structures
2022
Overview
In this paper, we present an effective design of a tri-band high-efficiency circular polarization (CP) convertor based on double-split-ring resonator (DSRR) structures in the microwave region. The proposed CP convertor is composed of a periodic array of sub-wavelength tri-layered DSRR structures separated by a dielectric spacer, which can convert the normal incident CP wave to its orthogonal one at the three different resonance frequencies. Numerical simulation results indicate that the cross-polarization transmission coefficients of CP wave can achieve maximum values of 0.81 at 6.95 GHz, 0.65 at 10.55 GHz, and 0.81 at 12.85 GHz, respectively, which is in reasonable agreement with experiment. In addition, the corresponding CP conversion efficiency is over 90% at three different resonance frequencies. The simulated surface current distributions indicate that the high-efficient CP conversion properties are mainly attributed to the near field electric and magnetic dipole coupling between the adjacent DSRR layers. Due to its excellent tri-band CP properties, the proposed structure would find potential applications in the fields of remote sensing, radar, and satellite communication.
