适用于GPR系统的紧的开口槽反足形维瓦尔迪天线
Feng Shen1, Ninghe Yang2, Chao Xia1
1School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Sensors (Basel, Switzerland)
|February 13, 2026
概括
这项研究介绍了一种用于地面透雷达 (GPR) 的紧型反极形维瓦尔迪天线 (AS-AVA). 这种新的设计实现了超宽带操作和稳定的辐射,这对于便携式GPR系统至关重要.
科学领域:
- 电磁和天线工程 电磁和天线工程
- 雷达系统和信号处理系统
背景情况:
- 由于波长限制,在3GHz以下的地面透雷达 (GPR) 天线的小型化具有挑战性,通常会导致阻抗不匹配和不稳定的辐射.
- 现有的紧型天线很难满足便携式和空中GPR应用的要求.
研究的目的:
- 为了呈现一个紧的光圈槽对立方体维瓦尔迪天线 (AS-AVA),设计用于稳定的辐射和超宽带运行在3GHz以下的频率.
- 通过专注于微型化和性能的共同设计策略,证明天线适用于紧的GPR平台.
主要方法:
- 使用辐射稳定性驱动的共同设计策略设计了一个紧的AS-AVA.
- 集成的光圈槽电流路径工程与曲以提高低频性能.
- 使用倾斜的矩形槽来控制边缘电流和抑制侧叶.
- 使用后载寄生补丁用于阻抗精制.
主要成果:
- 在FR-4原型上,从0.63到2.03GHz (105.26%的分数带宽) 实现了测量S11低于-10dB.
- 观察到稳定的远场辐射模式,实现的收益从2.1dBi增加到7.5dBi.
- 证明了良好的时间域忠实性,在0.6-2.1 GHz的范围内,群延迟在4-8 ns内.
- 在一步频连续波 (SFCW) GPR测试台中验证了天线性能,产生埋藏目标的清晰签名.
结论:
- 拟议的AS-AVA在小型化,宽带阻抗匹配和辐射稳定性之间提供了实用的平衡.
- 该天线非常适合用于紧的3GHz以下GPR系统,可实现有效的地下成像.
- 设计的进步有助于开发更具能力的便携式和空载GPR平台.
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