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Angle-insensitive conformal broadband reflective linear polarization converter

A reflective, linearly polarized technology, used in antennas, electrical components, etc., can solve the problems of high sensitivity to incident angle, unable to meet the requirements of conformal design, etc., to achieve wide application prospects, simple structure, and ensure angular stability. Effect

Active Publication Date: 2019-02-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Nowadays, the design of polarization converters is mostly based on planar structures, and the substrates are mostly hard materials, and they are highly sensitive to the incident angle, which cannot meet the requirements of conformal design.

Method used

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  • Angle-insensitive conformal broadband reflective linear polarization converter
  • Angle-insensitive conformal broadband reflective linear polarization converter
  • Angle-insensitive conformal broadband reflective linear polarization converter

Examples

Experimental program
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Embodiment 1

[0024] Such as figure 1 As shown, the length and width of the unit structure of the metamaterial structure layer (1) are both 5 mm. The center of the metal circular patch (6) is located at the coordinate origin, and the radius is equal to 1.5 millimeters. The outer radius of the long metal ring resonator (5) is equal to 2.4 mm, and the corresponding central angle is equal to 33 degrees. The outer radius of the short metal ring (7) is 2.4 millimeters, and the corresponding central angle is 190 degrees. The width of the long and short metal rings is 0.4mm. The dielectric layers (2) and (3) adopt a two-layer structure. The upper material of the dielectric layer is PET, the dielectric constant εr=3.0, the loss tangent value is 0.002, and the thickness is 0.12 mm. The material of the lower layer of the dielectric layer is PVC, and its dielectric constant εr=3.00 at 10 GHz, its loss tangent value is 0.014, and its thickness is 2 mm. The material of the metamaterial structure lay...

Embodiment 2

[0030] Such as Figure 5 As shown, taking the foam cylinder as an example, since the flexible material is used as the dielectric layer, the designed broadband linear polarization converter can conform to the foam cylinder.

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Abstract

The invention discloses an angle-insensitive conformal broadband reflective linear polarization converter and belongs to the field of electromagnetic wave polarization conversion. The polarization converter is formed by seamlessly stacking a metamaterial structural layer, two dielectric layers and a bottom metal backing plate. The metamaterial structural layer is composed of a long metal ring resonator, a circular metal patch and a short metal ring. The long metal ring resonator provides the anisotropy and the main resonance of the metamaterial, and the coupling of the circular metal patch andthe short metal ring adjusts the intensity and resonance frequency of magnetic resonance and electrical resonance, thereby realizing the broadband linear polarization conversion and good angle insensitivity. Furthermore, by using a flexible electromagnetic metamaterial as the dielectric layer, the designed polarization converter can be conformed to an object having a developable curved surface.

Description

technical field [0001] The invention belongs to the technical field of polarization converters of electromagnetic waves. Background technique [0002] A linear polarization converter is a device that can convert an incident linearly polarized electromagnetic wave to another linearly polarized electromagnetic wave. A metamaterial is a material composed of artificially designed microstructures that are much smaller than the operating wavelength and are arranged in a periodic or aperiodic arrangement. This new type of artificial electromagnetic metamaterial has electromagnetic properties that natural materials do not have. People can adjust it to have different permittivity and permeability in different directions, so as to generate corresponding phase differences in different directions, and realize the regulation of the polarization form of electromagnetic waves. Metamaterial structures are widely used in the design of polarization converters because of their anisotropic el...

Claims

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Application Information

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IPC IPC(8): H01Q15/24
CPCH01Q15/242
Inventor 孔祥鲲王奇严祥熙
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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