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On the measurement of in situ antenna radiation parameters from scattering measurements using a general scattering parametric model.

机译：使用常规散射参数模型从散射测量中测量原位天线辐射参数。

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摘要

The new concept of antenna radiation center (ARC) is introduced and an empirical method to measure it from complex scattering data is presented. This concept is different from the well-known antenna phase center utilized in reflector antenna applications.;A novel and efficient procedure based on a General Parametric Scattering Model (GSPM) is utilized to extract in-situ antenna radiation properties from complex antenna scattering data. This model based measurement approach has the advantage that it only requires two swept frequency scattering measurements in order to obtain antenna RCS, antenna gain and antenna radiation center in its integrated operational environment.;The GSPM structure required to accurately extract arbitrary target scattering data is developed based on basic electromagnetic principles. The mathematical model structure consists of an early time response based on a point scattering model and on a late time response based on the Singularity Expansion Method (SEM). Both of these methods are implemented to take into account the target dispersion in a general fashion. Robust signal processing algorithms are utilized to extract the model parameters by exploiting the model symmetry properties in the time and frequency domains. In particular, super-resolution algorithms such as ESPRIT and MUSIC are utilized to extract scattering center location and resonance frequency information, while Least Squares techniques are used to estimate the different model amplitude coefficients as a function of time or frequency in an optimal (i.e. mean square sense) fashion.;Theoretical derivations are provided to demonstrate that the GSPM can be utilized to extract antenna gain and radiation center information from scattering data. Synthetic and measured antenna scattering data are utilized to demonstrate the GSPM superior gain and radiation center results over traditional Fourier techniques. Gain transfer measurements results are also compared to the GSPM derived gain results. Finally, the additional applications of the GSPM are discussed and the effects of antenna radiation center to High Resolution Radar (HRR) and Synthetic Aperture Radar (SAR) are considered.
机译：介绍了天线辐射中心（ARC）的新概念，并提出了一种从复杂散射数据进行测量的经验方法。该概念与反射器天线应用中使用的众所周知的天线相位中心不同。基于通用参量散射模型（GSPM）的新颖高效程序可从复杂天线散射数据中提取原位天线辐射特性。这种基于模型的测量方法的优势在于，仅需两次扫频散射测量就可以在其集成的操作环境中获得天线RCS，天线增益和天线辐射中心。;开发了精确提取任意目标散射数据所需的GSPM结构。基于基本的电磁原理。数学模型结构由基于点散射模型的早期响应和基于奇异扩展方法（SEM）的晚期响应组成。实施这两种方法都是为了以常规方式考虑目标色散。通过利用时域和频域中的模型对称性，使用鲁棒的信号处理算法来提取模型参数。特别是，超分辨率算法（例如ESPRIT和MUSIC）用于提取散射中心位置和共振频率信息，而最小二乘技术则用于根据时间或频率来估计最优模型中不同的模型振幅系数（即均值）提供了理论推论，以证明GSPM可用于从散射数据中提取天线增益和辐射中心信息。利用合成的和测量的天线散射数据来证明GSPM具有优于传统傅立叶技术的出色增益和辐射中心结果。还将增益传输测量结果与GSPM得出的增益结果进行比较。最后，讨论了GSPM的其他应用，并考虑了天线辐射中心对高分辨率雷达（HRR）和合成孔径雷达（SAR）的影响。

著录项

  • 作者

    Mendez, Enrique Alberto.;

  • 作者单位

    University of Dayton.;

  • 授予单位 University of Dayton.;
  • 学科 Engineering Electronics and Electrical.;Physics Electricity and Magnetism.
  • 学位 Ph.D.
  • 年度 1999
  • 页码 268 p.
  • 总页数 268
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 人类学;
  • 关键词

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