Abstract
A dual-broadband and high-efficiency reflective linear polarization converter based on an anisotropic metasurface is presented. The device consists of two symmetrical, double-slotted metallic split-rings and one criss-cross structure, a dielectric layer, and a completely reflective metallic ground. The converter exhibits four resonances and can near-perfectly convert x- or y-polarized incident waves into cross-polarized waves in the frequency ranges of 9.38–13.36 GHz and 14.84–20.36 GHz. The polarization conversion ratios (PCRs) of the two bands are 98.21% and 99.32%, respectively. The energy conversion ratio (ECR) for energy loss measurement is almost 100% in these frequency bands. The polarization conversion principle is studied. The bandwidths and PCRs of the two bands are determined by varying the dielectric layer thickness. The simulation results are consistent with experimental observations. The designed dual-broadband and high-efficiency metasurface has great potential in the application of electromagnetic polarization control.
Highlights
The polarization of an electromagnetic (EM) wave is concerned with the oscillation direction of the electric field in the plane lying perpendicular to the propagation direction [1]
A high-efficiency and dual-broadband linear polarization converter based on a reflective metasurface is proposed, constructed, and evaluated
A high-efficiency dual-broadband linear polarization converter based on a reflective metasurface
Summary
The polarization of an electromagnetic (EM) wave is concerned with the oscillation direction of the electric field in the plane lying perpendicular to the propagation direction [1]. A cross-reflective polarization converter operating over a large frequency range with high efficiency was reported by Chen et al [33]. The phase difference equivalent to −180◦ and ∆φ at both 16.19 and 19.67 GHz is 180◦ These four frequencies are nearly between the EM waves polarized along the u- and v-directions after reflection is in the −180 ± 20. These surface currentare related to the flow directions of the induced currents
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