A method for correcting assembly errors of a planar reflectarray antenna

By constructing a digital twin model and a high-precision measurement system, combined with principal component analysis and dynamic phase compensation, the problem of assembly error in planar reflective array antennas was solved, achieving high robustness and adaptive error correction, and improving the stability and reliability of the antenna's electrical performance.

CN122242164APending Publication Date: 2026-06-19STATE GRID GANSU ELECTRIC POWER RESEARCH INSTITUTE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID GANSU ELECTRIC POWER RESEARCH INSTITUTE
Filing Date
2026-04-21
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing planar reflective array antenna assembly processes struggle to maintain subwavelength-level spatial accuracy. Traditional error compensation methods cannot dynamically detect non-uniform deformation and local misalignment under actual assembly conditions and lack the ability to jointly model multi-dimensional coupling errors, leading to unstable electrical performance.

Method used

A digital twin model is constructed, and error data is obtained by combining high-precision 3D scanning and near-field measurement systems. Key error sources are identified through principal component analysis and spatial clustering, and a mapping relationship between error and electrical performance is established. Error correction is achieved by using dynamic phase compensation and closed-loop verification.

Benefits of technology

It enables precise perception and quantitative analysis of assembly errors in planar reflective array antennas, improving the antenna's electrical performance in real deployment environments, including gains, sidelobe suppression, and beam pointing accuracy.

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Abstract

This invention relates to the field of antenna technology and discloses a method for correcting assembly errors in planar reflective array antennas. It aims to address the problems of existing assembly processes failing to maintain subwavelength-level accuracy, traditional compensation methods being unable to dynamically detect non-uniform deformation and local misalignment, and lacking the ability to jointly model multi-dimensional coupling errors. The method includes: constructing a digital twin model containing the theoretical positions and phase configurations of the reflective elements; acquiring spatial coordinates and radiation field data under the actual assembly state through 3D scanning and near-field measurement; establishing the mapping relationship between element position deviation, angle deflection, beam pointing error, and gain loss; identifying key error patterns and distribution regions using principal component analysis and spatial clustering; calculating the required phase correction for each element and generating a compensation distribution map. This application enables accurate perception, adaptive compensation, and online correction of assembly errors, significantly improving antenna gain, sidelobe suppression capability, and beam pointing accuracy.
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