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Far Field Reconstruction of Antennas via Single-Surface Phaseless Spherical Near-Field Scans: A Novel Approach based on Dipole Equivalence
  • Junzhe Tan,
  • Lingnan Song,
  • Zhiqiang Xiang
Junzhe Tan
Beihang University
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Lingnan Song
Beihang University

Corresponding Author:lingnan_song@buaa.edu.cn

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Zhiqiang Xiang
Beihang University
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Abstract

A novel approach is proposed in this paper to reconstruct the far-field radiation pattern from the phaseless electric field of an antenna scanned on a single near-field sphere. It adopts the dipole equivalence approach to project the near-field electric field into a spherically distributed array of electric dipoles. We introduce a term representing the residue from the linearly correlated portion in the least-square problem associated with the dipole equivalence, namely the linear correlation residue (LCR). It is demonstrated that by iterative search to minimize the LCR using the Covariance Matrix Adaptation Evolution Strategy (CMA-ES), near-field phase distributions can be found efficiently from the magnitude-only near-field, and the far-field radiation pattern can be computed. Two representative case studies are given here to validate the proposed method. Results demonstrate good agreements between computations and simulations.
Submitted to Electronics Letters
18 Sep 2024Review(s) Completed, Editorial Evaluation Pending
18 Sep 2024Editorial Decision: Revise Minor
02 Oct 20241st Revision Received
03 Oct 2024Submission Checks Completed
03 Oct 2024Assigned to Editor
03 Oct 2024Review(s) Completed, Editorial Evaluation Pending
03 Oct 2024Reviewer(s) Assigned
08 Oct 2024Editorial Decision: Accept