FUNDAMENTAL INVESTIGATION OF INVERSE SCATTERING PROBLEM BY MEANS OF MICROWAVE
微波逆散射问题的基础研究
基本信息
- 批准号:60550284
- 负责人:
- 金额:$ 1.34万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (C)
- 财政年份:1985
- 资助国家:日本
- 起止时间:1985 至 1986
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1. A SCATTERING CALIBRATOR COMPOSED OF PERFECTLY CONDUCTING HEMISPHERES FOR THE SYNTHETIC APERTURE RADAR HAS BEEN PROPOSED. AS A RESULT OF THE OPTIMIZATION OF THE RADII AND THE DISPOSITION OF THE HEMISPHERES, IT HAS BEEN CLARIFIED THAT THIS NEW CALIBRATOR IS VERY USEFUL COMPARED WITH THE CONVENTIONAL CORNER REFLECTOR.2. A METHOD TO ESTIMATE THE PERMITTIVITY AND THE CONDUCTIVITY OF ONE DIMENSIONAL INHOMOGENEOUS LAYERED MEDIUM FROM NOISY REFLECTION COEFFICIENT DATA FOR A SET OF DISCRETE FREQUENCIES AND/OR INCIDENT ANGLES WHICH MAKES USE OF TE WAVE AND TM WAVE OR BOTH, HAS BEEN PROPOSED. IT HAS BEEN DEMONSTRATED IN TERMS OF VARIOUS NUMERICAL EXAMPLES THAT THIS NEW METHOD IS VERY EFFECTIVE. IT HAS BEEN ALSO INDICATED THAT THE ERROR VARIANCE OF THE RECONSTRUCTED PROFILE CAN BE EFFECTIVELY ESTIMATED IN ADVANCE FROM THE ERROR VARIANCE OF THE MEASURED REFLECTION COEFFICIENT DATA. THE TIME DOMAIN INVERSE METHOD HAS ALSO INVESTIGATED. A METHOD TO RECONSTRUCT THE PERMITTIVITY PROFILE HAS BEEN PROPOSED, AND HAS INDICATED THAT THIS METHOD IS EFFECTIVE. WE ARE PLANNING TO EXPLORE THE TIME DOMAIN INVERSE SCATTERING TECHNIQUES FOR LOSSY MEDIUM IN DATAIL.3. THE RADAR IMAGING OF THE PERFECTLY CONDUCTING OBJECT HAS BEEN STUDIED. THE ITERATIVE INVERSE SCATTERING METHOD TO RECONSTRUCT THE PROFILE OF THE OBJECT BASED ON THE EXTENDED PHYSICAL OPTICS APPROXIMATION METHOD HAS BEEN PROPOSED. IT HAS BEEN INDICATED THAT THIS NEW METHOD IS VERY EFFECTIVE FOR THE AXIALLY SYMMETRIC SCATTERER. WE ARE PLANNING TO EXTEND THIS METHOD TO THREE DIMENSIONAL OBJECT.4. THE TRANSIENT RESPONSE OF A DIPOLE ANTENNA PLACED NEARBY THE INFINITE CONDUCTING CYLINDER HAS RIGOROUSLY ANALYZED FOR THE PURPOSE OF OBTAINING THE INVERSE SCATTERING ALGORITHM FOR VERY LONG CONDUCTING SCATTERER.
1. 提出了一种用于合成孔径雷达的由完美导电半球组成的散射校准器。由于半径的优化和半球的配置,已经表明这种新的校准器与传统的角反射器相比非常有用。2.提出了一种利用 TE 波和 TM 波或两者,根据一组离散频率和/或入射角的噪声反射系数数据来估计一维非均匀层状介质的介电常数和电导率的方法。各种数值例子表明这种新方法是非常有效的。还表明可以根据测量的反射系数数据的误差方差来提前有效地估计重构轮廓的误差方差。还研究了时域反演方法。提出了一种重建介电常数分布的方法,并表明该方法是有效的。我们计划在 DATAIL.3 中探索有损介质的时域逆散射技术。完美导电物体的雷达成像已被研究。提出了基于扩展物理光学逼近法的迭代逆散射法重建物体轮廓。已经表明,这种新方法对于轴对称散射体非常有效。我们计划将此方法扩展到三维物体。4。为了获得超长导电散射体的逆散射算法,对置于无限大导电圆柱附近的偶极子天线的瞬态响应进行了严格分析。
项目成果
期刊论文数量(14)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
TORU UNO: "ELECTROMAGNETIC INVERSE SCATTERING METHOD FOR ONE DIMENSIONAL INHOMOGENEOUS LAYERED MEDIA" PROCEEDINGS OF ISAP. III. 887-890 (1985)
Toru Uno:“一维非均匀层状介质的电磁逆散射方法”ISAP 论文集。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
SEIICHI TAKEUCHI: "RECONSTRUCTION OF INHOMOGENEOUS CONSTITUTIVE PARAMETERS IN TIME DOMAIN" ELECTROMAGNETIC THEORY REPORT OF IEE JAPAN. EMT-86. 105-114 (1986)
SEIICHI TAKEUCHI:“时域中非齐次本构参数的重建”IEE JAPAN 的电磁理论报告。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
NORIBUMI SHINOHARA: "SCATTERING CALIBRATOR COMPOSED OF CONDUCTING HEMISPHERES ON GROUND FOR SYNTHETIC APERTURE RADAR" TECHNICAL REPORT OF IECE JAPAN. A.P85-12. 1-6 (1985)
NORIBUMI Shinohara:“用于合成孔径雷达的由地面导电半球组成的散射校准器”日本 IECE 技术报告。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
TOSHINORI SUZUKI: "TRANSIENT RESPONSE OF DIPOLE ANTENNA PLACED NEARBR INFINITE CONDUCTING CYLINDER" TECHNICAL REPORT OF IECE JAPAN. (1987)
Toshinori SUZUKI:“偶极天线放置在无限导电圆柱附近的瞬态响应”IECE 日本的技术报告。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
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