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Optimization of Module Partition Based on Weighted Clustering Method for Wideband Irregular Subarrayed Array

In wideband beam scanning with module-level time delay and subarray-level phase shifting methods in irregular subarrayed planar arrays, obtaining the optimal module partition is a critical challenge. In this paper, we propose a module partition optimization method based on the weighted clustering me...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2023-07, Vol.71 (7), p.1-1
Main Authors: Chen, Ji-yuan, Xu, Zhen-hai, Dong, Wei, Xiao, Shun-ping
Format: Article
Language:English
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Summary:In wideband beam scanning with module-level time delay and subarray-level phase shifting methods in irregular subarrayed planar arrays, obtaining the optimal module partition is a critical challenge. In this paper, we propose a module partition optimization method based on the weighted clustering method. Firstly, we demonstrate that pattern matching is equivalent to the subarray-level excitation matching principle. Then we transform the complex optimization model into a real clustering optimization framework based on the second-order Taylor approximation, which reduces the computational complexity. Next the weighted clustering method is proposed to reduce the matching error by modifying the membership rule and cluster center of K-means clustering, ultimately obtaining the optimized module partition scheme. Additionally, we propose a minimum module quantity estimation method to explore the relationship between array bandwidth and module quantity. The proposed methods are applicable to both uniform and non-uniform weighting cases. The effectiveness and potential of the proposed method are verified by different numerical experiments and comparison of state-of art method.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2023.3270380