耦合目标近场散射外推技术研究

党娇娇; 李南京; 胡楚锋; 宋祖勋

doi:10.3969/j.issn.0372-2112.2017.06.007

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耦合目标近场散射外推技术研究

学术论文 | 更新时间：2025-07-16

- 耦合目标近场散射外推技术研究
- Near-Far Field Extrapolation Technique for Coupling Targets
- 电子学报 2017年45卷第6期页码：1327-1333
- 作者机构：
  
  1. 西北工业大学电子信息学院,陕西,西安,710072
  2. 西北工业大学无人机特种技术重点实验室,陕西,西安,710065
  3. 西北工业大学电子信息学院,陕西,西安,710072
  4. 西北工业大学无人机特种技术重点实验室,陕西,西安,710065
- 作者简介：
- 基金信息：
  
  国家自然科学基金 (No.61371023，No.61201320，No.61571368）
- DOI：10.3969/j.issn.0372-2112.2017.06.007
  中图分类号： TN95
- 网络出版：2017-06-25，
  
  纸质出版：2017
- 稿件说明：
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党娇娇, 李南京, 胡楚锋, 等. 耦合目标近场散射外推技术研究[J]. 电子学报, 2017,45(6):1327-1333.

DANG Jiao-jiao, LI Nan-jing, HU Chu-feng, et al. Near-Far Field Extrapolation Technique for Coupling Targets[J]. Acta Electronica Sinica, 2017, 45(6): 1327-1333.
党娇娇, 李南京, 胡楚锋, 等. 耦合目标近场散射外推技术研究[J]. 电子学报, 2017,45(6):1327-1333. DOI： 10.3969/j.issn.0372-2112.2017.06.007.

DANG Jiao-jiao, LI Nan-jing, HU Chu-feng, et al. Near-Far Field Extrapolation Technique for Coupling Targets[J]. Acta Electronica Sinica, 2017, 45(6): 1327-1333. DOI： 10.3969/j.issn.0372-2112.2017.06.007.

摘要

针对具有多次散射的耦合目标在不满足远场条件下测量的散射方向图发生畸变的问题，通过分析耦合目标的近场-远场转换关系，提出一种多发多收模式的近场散射外推方法.在获得全角域的近场双站信息后，对各角度近场接收的散射数据进行外推处理，然后根据互易定理，将外推后的数据等效为远场发射、近场接收数据.接下来对该数据再进行一次外推，满足远场发射、远场接收的条件，最后取出对角线上的元素获得各角度的远场RCS（Radar Cross Section，RCS）.通过建立存在强耦合机制的二面角和腔体结构模型，利用FEKO和MATLAB软件对方法进行仿真，将多发多收外推的结果与远场RCS进行比对.结果表明：该方法得到的结果与远场RCS方向图吻合良好，全角域均值误差小于1dB，验证了方法的有效性.

Abstract

In allusion to the problem that the scattering pattern of coupled target is distorted under the conditions of distance not satisfy the far field.By analyzing the relationship between near-field and far-field of coupling targets

an extrapolation method of multiple-transmitter and multiple-receiving is proposed.Firstly

the bistatic data of near-field at each angles are measured and extrapolated.Then the extrapolated data can be equivalent to far-field transmitting

near-field receiving data by the reciprocity theorem.Secondly

these data should be extrapolated again due to meet the far-field transmitter

far-field receiving conditions.Finally

diagonal elements is selescted to be the monostatic radar cross section (RCS)at each angles.By creating a dihedral angle model which has strong coupling mechanisms

through the simulation with FEKO and MATLAB

the far-field RCS is compared with the result of extrapolation by multiple-transmitter and multiple-receiving.The results obtained by this method show a good agreement with the RCS of the far-field

and the average error is less than 1dB

which verifies the method is effectiveness.

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