Scattering-controllable random coding meta-surface and control method

A technology of random coding and control method, applied in the direction of electrical components, antennas, etc., can solve the problem of direction prediction and control of unscattered waves, and achieve the effect of unique physical connotation

Active Publication Date: 2017-04-19
SOUTHEAST UNIV
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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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  • Scattering-controllable random coding meta-surface and control method
  • Scattering-controllable random coding meta-surface and control method
  • Scattering-controllable random coding meta-surface and control method

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Embodiment Construction

[0022] For traditional stochastic metasurfaces (such as figure 1 As shown), the vertically incident plane wave will be randomly diffusely 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 can flexibly control the scattering wave working in the THz band A controllable random metasurface with wave direction and scattering area size, a plane wave of normal incidence will be diffusely reflected to the specified direction area, such as figure 2 shown. This controllable random metasurface is formed by arranging discrete reflective phase encoding units according to a preset law, which is specifically composed of a random encoding matrix ( image 3 pattern on the left) and periodic encoding ( image 3 The mixed coding matrix ( image 3 pattern on the right). This embodiment also correspondingly proposes a random metasurface scattering contro...

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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 scattering-controllable random-coded metasurface and a control method. Background technique [0002] New artificial electromagnetic materials (Metamaterials), also known as electromagnetic metamaterials or heterogeneous media, are composed of macroscopic basic units with specific geometric shapes arranged periodically or aperiodically, or implanted into the body (or surface) of the matrix material. An artificial material. The difference between electromagnetic metamaterials and traditional materials is that the original micro-scale units (atoms or molecules) are replaced by macro-scale units. Although the unit sizes of the two are quite different, their responses to external electromagnetic waves are reflected by the interaction between the basic unit resonant system and the external electromagnetic field. New artificial electromagnetic materials define the...

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Application Information

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