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相关概念视频

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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微波外来物体检测在丢失的介质使用平面阵列天线.

Longzheng Yu1, Peng Xu2, Wenbo Li1

  • 1Research Center of Applied Electromagnetics, Nanjing University of Information Science and Technology, Nanjing 210044, China.

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概括

本研究介绍了一种阵列天线系统,用于在有损的介质中非接触式异物检测. 该系统通过聚焦电磁能量精确定位嵌入物体,提高环境和农业安全.

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检测外来物体检测外来物体检测亏损的中等这是最大功率传输效率的方法.微条纹补丁阵列天线天线非接触式检测检测器

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科学领域:

  • 电磁学 电磁学 电磁学 电磁学
  • 天线理论天线理论
  • 传感器技术 传感器技术

背景情况:

  • 在损耗介电介质 (土壤,植被,冰) 中非接触式检测异物具有挑战性.
  • 应用包括环境监测和农业安全,需要精确的定位.
  • 现有的方法在准确性和适用于有损环境方面存在局限性.

研究的目的:

  • 设计和实验验证一个阵列天线系统,以准确地在损失介质中定位异物.
  • 开发一种利用聚焦电磁能的非接触式检测方案.
  • 为了证明嵌入外来物体的精确定位的可行性.

主要方法:

  • 利用一个阵列天线系统,为聚焦的电磁能量优化激发分布.
  • 测量发射和接收天线元件之间的散射参数.
  • 使用基于差异散射参数矩阵的最大功率传输效率方法.
  • 制造和测试一个5x5微条纹补丁阵列天线在油与铜块作为异物.

主要成果:

  • 证明了辐射电磁场在异物位置的有效聚焦.
  • 在油中浸泡的一块铜块的精确定位.
  • 验证了非接触式检测方案的可行性和精度在有损的介质中.

结论:

  • 拟议的阵列天线系统能够在损耗介电介质中精确的非接触式异物检测.
  • 电磁聚焦技术在定位应用中被证明是有效的.
  • 这种方法为环境监测和农业安全提供了一个有希望的解决方案.