一个循环极化宽带复合螺旋天线用于地面透雷达
Hai Liu1, Shangyang Zhang1, Pei Wu1
1School of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, China.
Sensors (Basel, Switzerland)
|April 28, 2025
概括
一个新的循环偏振天线改进了地面穿透雷达 (GPR) 用于检测地下线性物体. 这种先进的天线提供了更好的极化灵敏度和地下目标识别能力.
科学领域:
- 电磁学和天线设计
- 地质物理勘探技术
背景情况:
- 穿透地面雷达 (GPR) 系统需要增强的偏振灵敏度,以准确地识别地下目标.
- 对于传统的GPR系统来说,检测地下线性物体仍然是一个挑战,特别是那些使用线性极化天线的系统.
研究的目的:
- 设计和评估一个循环偏振宽带复合螺旋天线,以提高GPR性能.
- 提高GPR中的地下目标识别和极化灵敏度,特别是对线性地下物体.
主要方法:
- 整合等角和阿基米德螺旋结构,创建一个宽带复合螺旋天线 (1-5 GHz).
- 利用一个指数渐变的微条球来匹配阻抗,以及一个金属支持的腔体,用吸收材料来增强导向性.
- 实验验证了天线的辐射性能,稳定的圆极化 (轴向比<3dB),以及适用于极度测量GPR的适用性.
主要成果:
- 设计的天线在1-5 GHz工作频段中表现出稳定的圆极化特征.
- 实验结果证实了卓越的辐射性能和导向性.
- 3D GPR测量表明,与线性极化带天线相比,地下线性物体的检测能力更强.
结论:
- 循环极化宽带复合螺旋天线显著提高了GPR在地下线性物体检测的能力.
- 该天线的稳定圆极化和宽带性能使其成为先进的极对称GPR系统的理想选择.
- 这种设计代表了GPR技术在地球物理勘探和目标识别方面的显著进步.
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