概括
一种新的方法通过取消散射模式,精确控制相位阵列中的雷达截面 (RCS). 这种技术优化了散射模式,同时保持了实验验验证的基本辐射性能.
科学领域:
- 电磁和天线 电磁和天线
- 超材料和应用电磁学
背景情况:
- 阶段阵列在现代雷达和通信系统中至关重要.
- 控制雷达截面 (RCS) 对隐形应用和减少干扰至关重要.
- 现有的方法往往会损害辐射效率或缺乏精确的散射控制.
研究的目的:
- 提出一种基于散射模式取消网络的阶段阵列的新型RCS控制方法.
- 为了实现精确的散射调节,同时保持阵列的辐射性能.
- 为了实现任意散射模式优化和快速RCS预测.
主要方法:
- 导出负载阻力,相延迟,天线模式散射场 (AMSF) 和结构模式散射场 (SMSF) 之间的分析关系.
- 使用衍生公式快速预测AMSF,避免计算上昂贵的全波模拟.
- 通过结合SMSF和调制的AMSF来精确取消散射,合成总散射场.
- 设计一个阻抗匹配网络,以确保端口匹配并保持辐射性能.
主要成果:
- 拟议的方法精确地控制RCS以在特定的冲击角度或角度域定位值.
- 已证明显著的RCS降低: -60 dBsm在正常发作时, -50 dBsm在斜发作时.
- 在一个8元线性阵列的整个角域中,实现了低于-40dBsm的RCS.
- 实验验证证证实了数值结果,表明辐射性能得到保留.
结论:
- 散射模式取消网络为分相阵列中精确的RCS控制提供了一种有效的方法.
- 该方法成功地平衡了散射减少与辐射特征的保存.
- 通过制造和实验验证,该技术显示了隐形和干扰管理的实际适用性.
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