太赫兹目标RCS测量误差估计方法及其应用

Application of measurement error estimation method for Terahertz target’s RCS

摘要:

太赫兹频段下非标准体目标的雷达散射截面积(RCS)较难通过电磁散射计算的方式得到结果，实验测量得到目标RCS成为该频段下的可行方案。然而，目前尚不具备系统性的估计指标来分析实测结果的误差特性。相比于目前较为简单的测量误差分析方式，本文提出3种太赫兹目标RCS测量误差估计指标；随后结合具有RCS解析解的目标，验证、分析所提估计指标的实用性和有效性。实测数据分析结果表明，本文提出的测量误差估计指标能够反映测量数据的误差规律与误差水平，具有实用性，有助于发现实验系统及实测数据处理中的有待优化之处。

Abstract:

In Terahertz band, the Radar Cross Section(RCS) of an irregular target can hardly be acquired by electromagnetism calculation. Therefore, the method of measuring their RCS becomes a feasible solution. However, there is no systemic error estimation index to analyze the identity of measured results. Compared with the present simplex measurement error estimation indexes, this paper puts forward three kinds of error estimation index for measuring the RCS of terahertz targets. Then it combines the target’s RCS resolution with its measurement results and analyzes the practicability and efficiency of the estimation indexes. According to the data analysis, the advanced error estimation indexes can reflect the measurement error’s orderliness and standard, which shows the proposed method is practical and can contribute to discover the weakness of the measurement system and the data processing.