Orbital Angular Momentum Pattern Synthesis via Convex Optimization

This letter presents an effective optimization synthesis approach for orbital angular momentum (OAM) beams with low sidelobe and high mode purity through antenna array complex excitation optimization. The optimal synthesis is formulated as minimizing a linear function of the real and the imaginary p...

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Bibliographic Details
Published inIEEE antennas and wireless propagation letters Vol. 24; no. 7; pp. 2039 - 2043
Main Authors Wang, Jing, Ding, Haibing, Guo, Naining, Cai, Yang, Xue, Qianzhong
Format Journal Article
LanguageEnglish
Published IEEE 01.07.2025
Subjects
Antenna arrays
Aperture antennas
Array antenna
Arrays
Computational complexity
Convex functions
convex programming (CP)
Lattices
low sidelobe
Optimization
optimized synthesis
orbital angular momentum (OAM) antenna
Orbital calculations
Shape
Training
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Summary:This letter presents an effective optimization synthesis approach for orbital angular momentum (OAM) beams with low sidelobe and high mode purity through antenna array complex excitation optimization. The optimal synthesis is formulated as minimizing a linear function of the real and the imaginary parts of the array excitations on a convex set, expressed as a convex programming problem. Besides, two simplification methods are introduced to reduce computational complexity and enhance efficiency. Numerical experiments involving diverse array boundary configurations, element arrangements, OAM mode numbers, and complex pattern mask cases are performed, and the results validate the flexibility, effectiveness, and broad applicability of the proposed approach.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2025.3555237