一种稀布阵列天线的近场波束综合算法

doi:10.3969/j.issn.1001-2400.2018.06.003

摘要/Abstract

摘要：

针对由于稀布阵列天线孔径较大导致大多数感兴趣的探测目标位于近场范围内的问题，提出了一种近场情况下的稀布阵列天线波束综合算法．通过采用近场电磁波传播模型，对传播时延表达式进行分析，在给定阵元数目和不同阵元间距约束的条件下，通过差分进化等智能算法实现了控制峰值旁瓣电平的稀布直线阵列综合，同时给出了相应的算法步骤．通过给定场景下的计算机仿真实验验证了算法的有效性和可行性，实现了在较高稀疏率情况下的近场聚焦波束修正和峰值旁瓣电平控制．仿真实验证明，所提算法有效地降低了阵列间距拉开产生的高峰值旁瓣电平，得到了比传统算法更好的旁瓣性能．

关键词: 稀布阵列天线, 近场, 差分进化算法, 峰值旁瓣电平

Abstract:

Due to the problem that the large aperture of sparse array antennas leads to most interested targets lying in the near-field, we propose a novel near-field beam synthesis method for sparse array antennas. By utilizing the propagation model of near-field electromagnetic waves, we analyze the original propagation delay expression. When the number of antenna elements and the interval bounds are fixed, this method achieves a lower peak side-lobe level of the linear sparse array via differential evolution, with the steps of the algorithm given. Computer simulation shows the effectiveness and feasibility of the algorithm by realizing near-field beam focusing and PSLL controlling under high sparseness. It is proved that the proposed method reduces the high peak side-lobe level brought by the large array aperture, and has better performance than traditional methods.

Key words: sparse array antennas, near field, differential evolution, peak side-lobe level

中图分类号:

TN957

宋嘉奇, 陶海红. 一种稀布阵列天线的近场波束综合算法[J]. 西安电子科技大学学报, 2018, 45(6): 14-18.

SONG Jiaqi, TAO Haihong. Near-field beam synthesis algorithm for sparse array antennas[J]. Journal of Xidian University, 2018, 45(6): 14-18.

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