Multi-channel near-field information transmission system based on a programmable metasurface

Abstract

The invention discloses a multi-channel near-field information transmission system based on a programmable metasurface, the system comprises the programmable metasurface composed of a plurality of periodically arranged one-bit digital units and a digital control unit, and the scattering field of the whole metasurface is formed by superposing the scattering fields of all the digital units. When thedigital coding state of each unit is changed, the whole mouth surface scattering field is changed along with the digital coding state. Therefore, energy distribution of scattered waves can be controlled by designing different mouth surface coding combinations. The multi-channel direct transmission of near-field information is realized by utilizing the spatial domain and time domain characteristics of the programmable metasurface to electromagnetic waves, and the system provided by the invention does not need an independent phase shifter and an independent signal modulator, so that the systemis greatly simplified, and the development cost of the system is saved. It is hopeful to obtain a wide application in near field information transmission and signal processing.

Description

technical field [0001] The invention belongs to the field of novel artificial electromagnetic media, and in particular relates to a multi-channel near-field information transmission system based on a programmable metasurface. Background technique [0002] In the traditional information transmission system, the modulation processing of the signal is completed in the baseband circuit, and then the signal is radiated outward through the antenna after being up-converted; and in order to achieve the purpose of multi-channel transmission of information, complex signal processing technology and Costly hardware architecture. [0003] Programmable metasurface is a digitally reconfigurable artificial electromagnetic surface, which is composed of a large number of sub-wavelength digitally reconfigurable artificial units. Because the scattering field of the metasurface is the superposition of the scattering fields of all units, the characteristics of the electromagnetic field at a spec...

AI Technical Summary

Problems solved by technology

[0002] In the traditional information transmission system, the modulation processing of the signal is completed in the baseband circuit, and then the signal is radiated outward through the antenna after being up-converted; and in order to achieve the purpose of multi-channel transmission of information, complex signal processing technology and expensive hardware architecture

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