Synthesis of shared aperture thinned interleaved arrays with elements in concentric rings

Zhigang GU; Longjun LI; Jikuan HU

doi:10.11959/j.issn.1000-0801.2023034

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Synthesis of shared aperture thinned interleaved arrays with elements in concentric rings

Research and Development | 更新时间：2024-06-05

- Synthesis of shared aperture thinned interleaved arrays with elements in concentric rings
- Telecommunications Science Vol. 39, Issue 2, Pages: 145-156(2023)
- 作者机构：
  
  1. 空军通信士官学校，辽宁大连 116600
  2. 中国人民解放军94923部队，福建南平 354300
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.1000-0801.2023034
  CLC： TN820
- Published Online：2023-02，
  
  Published：20 February 2023
- 稿件说明：
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Zhigang GU, Longjun LI, Jikuan HU. Synthesis of shared aperture thinned interleaved arrays with elements in concentric rings[J]. Telecommunications science, 2023, 39(2): 145-156.
DOI：

Zhigang GU, Longjun LI, Jikuan HU. Synthesis of shared aperture thinned interleaved arrays with elements in concentric rings[J]. Telecommunications science, 2023, 39(2): 145-156. DOI： 10.11959/j.issn.1000-0801.2023034.

摘要

同心圆阵列天线具有波束对称、360°方位角扫描、抗干扰能力强等优点，被广泛应用于星载、机载、舰载雷达及飞机声呐等领域。在天线孔径有限的情况下，如何进一步提高同心圆阵的孔径利用率，通过孔径的空分复用，设计出子阵稀疏交错分布的多功能同心圆阵列天线，具有较大的研究价值。利用均匀同心圆阵列天线激励与方向图函数存在二维傅里叶-贝塞尔变换关系，基于二维三次插值和密度加权，提出了一种同心圆阵稀疏交错优化布阵的方法。该方法通过对均匀同心圆阵列天线方向图采样值的频谱能量进行分析，采用三次插值的方法，实现了同心圆天线阵列方向图函数到同心圆阵元激励能量的映射转换；基于密度加权的原理，对排序后归一化阵元激励的奇偶交错选取，使得稀疏交错子阵方向图频谱能量均分匹配，实现了同心圆阵的稀疏交错优化布阵设计。仿真结果表明，该方法得到的交错子阵天线具有峰值旁瓣电平低、主瓣宽度窄且方向图性能近似程度高的优点，有效解决了同心圆阵列天线稀疏交错优化布阵的设计难题，实现了两子阵交错的共享孔径多功能同心圆阵列天线设计。

Abstract

Among planar array antennas

concentric ring array (CRA) antennas have received considerable interest since it is symmetric and provides invariant beam pattern for 360° azimuthal coverage.In case of limited antenna aperture

there is great value to thinned interleaved CRA with low peak side lobe levels and a narrow main beam.The application of the cubic interpolation and density-weighting method in shared aperture array design was demonstrated by the low peak side lobe level synthesis of CRA.By adopting the Fourier-Bessel transform the relationship between the element’s excitation and array pattern

thinned interleaved problems were formulated as time-frequency synthesis problems.On the basis of the density-weighting method

element excitations of interleaved sub-array were carefully selected in an odd-even manner

which ensured the pattern matching of the generated sub-array.The iterative FFT algo rithm was adopted to thin the concentric ring array.Simulation results show that the proposed algorithm can achieve a favorable thinned and interleaved concentric ring array design with matched power patterns and low peak sidelobe levels.The problem of thinned and interleaved concentric ring arrays is solved

and the design of multi-function shared aperture thinned interleaved arrays with elements in concentric rings is realized.

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references

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