概括
这项研究引入了一种新的1位循环极化 (CP) 可重新配置的传输阵列 (TA),可以显著提高轴比 (AR) 带宽和光圈效率 (AE). 新设计克服了现有的CP超表面的局限性,为先进的天线应用实现了卓越的性能.
科学领域:
- 超材料和纳米光子学
- 电磁学和波浪传播
- 天线理论和设计.
背景情况:
- 离散相位元表面通常由于旋转相位控制不足而表现出有限的轴比 (AR) 带宽和光圈效率 (AE).
- 现有的循环极化 (CP) 超表面努力实现强大的信号传输所必需的广泛AR带宽.
- 旋转脱策略对于提高CP元面中的AR带宽至关重要.
研究的目的:
- 提出一种新的1位CP可重配置的传输阵列 (TA),同时提高AR带宽和光圈效率.
- 从理论上分析一位CP数组对AR带宽的限制.
- 设计和验证一个CP超表面,克服当前离散相设计的局限性.
主要方法:
- 在1位CP数组中分析AR带宽约束的理论导出.
- 开发一个直角元素阵列来解共极化和交叉极化相位模式.
- 使用局部化块和可重新配置元素的可调节辐射层来优化阵列设计.
- 由平面 CP 料源激发的拟议的 1 位 CP TA 的制造和测量.
主要成果:
- 拟议的1位CP TA在10GHz时实现了24.4%的光圈效率 (AE),与连续相阵列相似.
- 在增益变化 (<3dB) 方面,证明的相对带宽高于21.1%,在增益变化 (<3dB) 方面高于30.8%.
- 实现了±60°的广角光束扫描,并得到了验证的模拟和测量结果.
结论:
- 新的1位CP重配置的发射阵列有效地提高了AR带宽和光圈效率.
- 拟议的设计克服了离散相 CP 地表的关键局限性,提供了更好的性能.
- 经过验证的结果证实了这种方法对于需要广角光束扫描和高效率的先进天线系统的潜力.
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