Metasurface near-field unit response difference calibration method and device

By calibrating the differences in the radiation response of metasurface units, and utilizing Fourier series decomposition and spherical wave models, the problem of inconsistent metasurface unit responses was solved, enabling precise control of near-field beam focusing, simplifying the operation process and improving the effect.

CN122247530BActive Publication Date: 2026-07-21NAVAL UNIV OF ENG PLA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAVAL UNIV OF ENG PLA
Filing Date
2026-05-22
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In the near-field region of wireless communication, the electromagnetic response of metasurface units varies due to differences in manufacturing processes and materials, resulting in inconsistent responses that affect the precise control of beam focusing.

Method used

By generating control signals for metasurface units, and using Fourier series decomposition and spherical wave models, the propagation response is calculated, the radiation response differences of the metasurface units are calibrated, and near-field beam focusing is achieved.

Benefits of technology

It improves the near-field beam focusing effect, simplifies the operation process, requires no additional hardware, is suitable for reflective and transmissive metasurface systems, can be optimized by software adjustments, and has strong applicability.

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Abstract

The application provides a metasurface near-field unit response difference calibration method and device, the method comprises the following steps: generating a control signal according to the modulation period and position of the metasurface unit; decomposing the control signal of each metasurface unit by Fourier series to obtain a harmonic distribution, and obtaining a standard harmonic distribution matrix according to the harmonic distribution of all metasurface units; after the receiving module receives the signal radiated by the metasurface unit, performing fast Fourier transform on the digital signal obtained by sampling the digital module to obtain a harmonic component; using a spherical wave model to calculate the propagation response according to the position of the receiving module and the position of each metasurface unit; obtaining the radiation response of each metasurface unit to the feed signal according to the standard harmonic distribution matrix, the harmonic component and the propagation response, and calibrating the difference between the radiation responses of the metasurface units. The application realizes the measurement and calibration of the difference between units by applying period time modulation.
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