...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Coupled micro-Doppler signatures of closely located targets
【24h】

Coupled micro-Doppler signatures of closely located targets

机译：耦合的微多多普勒签名密切目标

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The classical Doppler shift originates from the movement of a target's center of mass, but it does not hold information about the internal dynamics of the scattering object. In contrast, micro-Doppler signatures contain data about the micromotions that arise from internal degrees of freedom within the target (such as rotation and vibration), which can be remotely detected by careful analysis of the scattered field. Here we investigate, both theoretically and experimentally, how coupling between a pair of closely situated targets affects the resulting micro-Doppler signatures. The presented model considers a pair of near-field coupled resonators with dynamically reconfigurable scattering properties. Voltage controlled varactor diodes enable modulating the scattering cross section of each target independently, mimicking rotational degrees of freedom. As a result, coupled micro-Doppler combs are observed, containing frequency components that arise from the near field interactions, making it possible to extract information about the internal geometry of the system from far-field measurements. From a practical point of view, micro-Doppler spectroscopy allows remote classification of distant objects, while deep understanding of the coupling effects on such signatures in the low frequency regime can provide valuable insight for radar and sonar systems, as well as optical and stellar radio-interferometry, among many others.
机译：经典多普勒转移源自目标质量中心的运动，但它不会保持有关散射物体的内部动态的信息。相反，微多普勒签名包含关于从目标内部（例如旋转和振动）内的内部自由度产生的微调的数据，这可以通过仔细分析散射场来远程检测。在这里理论地和实验，我们在理论上和实验上调查一对密切的目标之间的耦合如何影响所得到的微多普勒签名。呈现的模型认为具有动态可重新配置的散射特性的一对近场耦合谐振器。电压控制变容二极管使独立地调制每个目标的散射横截面，模拟旋转自由度。结果，观察到耦合的微多普勒梳栓塞，其中包含从近场相互作用产生的频率分量，使得可以从远场测量中提取有关系统内部几何形状的信息。从实际的角度来看，微多普勒光谱允许远程分类远程物体，同时深入了解低频制度中这些签名的耦合效应可以为雷达和声纳系统提供有价值的见解，以及光学和恒星无线电 - 在许多其他人中间。

著录项

  • 来源
    《Physical review》 |2019年第21期|214308.1-214308.6|共6页
  • 作者

    Kozlov Vitali; Kosulnikov Sergey; Filonov Dmitry; Schmidt Andrey; Ginzburg Pavel;

  • 作者单位

    Tel Aviv Univ Sch Elect Engn IL-69978 Tel Aviv Israel;

    Tel Aviv Univ Sch Elect Engn IL-69978 Tel Aviv Israel;

    Moscow Inst Phys & Technol Ctr Photon & 2D Mat Dolgoprudnyi 141700 Russia;

    Tel Aviv Univ Sch Elect Engn IL-69978 Tel Aviv Israel;

    Tel Aviv Univ Sch Elect Engn IL-69978 Tel Aviv Israel;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号