概括
一个新的共享光圈MIMO天线集成雷达截面减少使用偏振转换 metasurface. 这种设计实现了从2-6.9GHz的宽辐射带宽和S,C和X频段的低散射.
科学领域:
- 天线工程天线工程
- 超材料是指一种超材料.
- 电磁学 电磁学 电磁学 电磁学
背景情况:
- 多输入多输出 (MIMO) 天线对于现代无线通信系统至关重要.
- 雷达横截面 (RCS) 减小对于隐形应用来说至关重要.
- 将多个功能集成到一个单一的天线平台中,带来了重大设计挑战.
研究的目的:
- 提出一种三频段共享光圈MIMO天线,具有固有的RCS降低能力.
- 为了实现广泛的运行带宽和显著的低散射性能.
- 为了证明极化转换元表面 (PCM) 对于RCS减少的有效性.
主要方法:
- 一个分布在棋盘上的双层PCM被设计用于从4-14 GHz降低RCS.
- 一个用PCM养的L形分支形成了一个运行在5.3-6.9GHz的元天线.
- 超天线被集成到4x2双极化MIMO配置中,在空缺区域加载额外的天线以实现多频段操作.
- 使用频率选择性表面 (FSS) 和额外层控制RCS (ALCR) 来提高性能和减少散射.
主要成果:
- 实现了110.1%的辐射带宽,覆盖2至6.9GHz (S和C频段).
- 从2-12.2 GHz (S,C和X频段) 实现了低散射带宽.
- 在操作频段内,已证明RCS降低 (RCSR) 为9dB.
- 在没有额外的脱结构的情况下,在MIMO元素之间保持高隔离 (>20 dB).
结论:
- 拟议的共享光圈MIMO天线有效地结合了宽带辐射和显著的RCS减少.
- 集成PCM和FSS技术为多功能天线设计提供了一种可行的方法.
- 这种设计为需要高性能通信和隐形能力的应用提供了有希望的解决方案.
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