A scattering-controllable random-coded metasurface and its control method

A random coding and control method technology, applied in the direction of antennas, electrical components, etc., can solve problems such as prediction and control of scattered wave directions, and achieve unique effects of physical connotation

Active Publication Date: 2019-07-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it still cannot predict and control the direction of scattered waves

Method used

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  • A scattering-controllable random-coded metasurface and its control method
  • A scattering-controllable random-coded metasurface and its control method
  • A scattering-controllable random-coded metasurface and its control method

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Embodiment Construction

[0022] For traditional random metasurfaces (such as figure 1 (Shown), the plane wave incident perpendicularly will be randomly diffused and reflected in various directions, and the direction of the scattered wave can neither be predicted nor controlled; in order to expand its applicability, this embodiment proposes a method that works in the THz band and can flexibly control the scattering A controllable random metasurface with wave direction and size of the scattering area, the plane wave incident perpendicularly will be diffusely reflected to the specified direction area, such as figure 2 Shown. This controllable random metasurface is composed of discrete reflection phase encoding units arranged according to a preset law, and the preset law is specifically composed of a random encoding matrix ( image 3 Pattern on the left) and period coding ( image 3 Intermediate pattern) superimposed hybrid coding matrix ( image 3 Pattern on the right). This embodiment also correspondingl...

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Abstract

The invention discloses a scattering-controllable random coding meta-surface which is composed of coding units with a discrete reflection phase arranged according to a preset rule. The preset rule is specifically a hybrid coding matrix formed through superposition of a random coding matrix and a periodic coding matrix. The invention further discloses a scattering control method of the random coding meta-surface, which can be used to control and predict the scattering direction. The size of a random scattering distribution area can be controlled effectively, and thus, the amount of information carried can be controlled. A scattering image produced in the invention can be compared to the concept of electron cloud in quantum mechanics, contains a specific physical mechanism, and has a unique relationship with information coding. Predictably, the scope and quality of compressed radar imaging can be improved, and the meta-surface has a huge impact on conventional reflection materials and diffuse reflection materials based on microwave, optical frequency band and even acoustic frequency band.

Description

Technical field [0001] The invention relates to a new type of artificial electromagnetic material, in particular to a scatter-controllable random coded super-surface and a control method. Background technique [0002] New artificial electromagnetic materials (Metamaterials), also known as electromagnetic metamaterials or anisotropic media, are formed by periodically or aperiodically arraying macroscopic basic units with specific geometric shapes, or implanting them into the body (or surface) of the matrix material An artificial material. The difference between electromagnetic metamaterials and traditional materials is that macroscopic size units replace the original microscopic size units (atoms or molecules). Although the unit sizes of the two are quite different, their response to external electromagnetic waves is reflected by the interaction between the basic unit resonance system and the external electromagnetic field. New artificial electromagnetic materials define the beh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0086
Inventor 崔铁军刘硕白国栋
Owner SOUTHEAST UNIV
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