Design method for multi-beam radiation and polarization control based on anisotropic metasurfaces

Abstract

The invention discloses a multi-beam radiation and polarization regulation design method based on an anisotropic electromagnetic metasurface. The method comprises following steps of calculating phase distributions needing to be satisfied for forming a single beam on the anisotropic electromagnetic metasurface according to the radiation angles of the single beam in two orthogonal directions; with respect to the beams with the same radiation angles in the two orthogonal directions, on the basis of satisfying the phase distributions of the single beam, designing the phase difference in the two orthogonal directions according to the polarization mode of each beam; carrying out vector superposition on the phase distributions of the multiple beams in the two orthogonal directions according to an aperture field superposition method, thus obtaining the final phase distributions on the anisotropic electromagnetic metasurface; and finding out the sizes of the anisotropic unit structures corresponding to the final reflection phase distributions according to the final reflection phase distributions on the anisotropic electromagnetic metasurface in the two orthogonal directions. Compared with the prior art, the method has the advantages that the polarization mode of each beam can be regulated and the multiple beams can be regulated.

Description

technical field [0001] The invention belongs to the field of microwave devices, in particular to a multi-beam radiation and polarization control design method based on anisotropic metasurface. Background technique [0002] Anisotropic electromagnetic metasurfaces have different electromagnetic responses to incident electromagnetic waves in different polarization directions, so they have great research value in the beam control and polarization control of electromagnetic waves. However, most of the current research based on anisotropic electromagnetic metasurfaces It is the research on a single beam under the incident conditions of plane waves, such as polarization conversion or polarization separation, which is difficult to meet some low-profile, multi-beam applications. [0003] The traditional multi-beam planar reflectarray antenna can construct a suitable phase distribution according to the principle of phase compensation to simultaneously generate multiple pencil-shaped ...

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Problems solved by technology

[0002] Anisotropic electromagnetic metasurfaces have different electromagnetic responses to incident electromagnetic waves in different polarization directions, so they have great research value in the beam control and polarization control of electromagnetic waves. However, most of the current research based on anisotropic electromagnetic metasurfaces It is the research on a single beam under the incident conditions of plane waves, such as polarization conversion or polarization separation, which is difficult to meet some low-profile, multi-beam applications

[0003] The traditional multi-beam planar reflectarray antenna can construct a suitable phase distribution according to the principle of phase compensation to simultaneously generate multiple pencil-shaped beams with different radiation directions, but the polarization of the beam is usually single and cannot be adjusted.

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