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Equivalent Currents on an Anisotropic Material Backed by a Metal Surface and Their Relation

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Journal of Systems Engineering and Electronics 2000年第4期11卷 1-10页

作者： Huang Peikang Yin Hongcheng national electromagnetic scattering lab.ratory Beijing 100854P.R.China

Based on a first-order state-vector differential equation representation of Maxwell's equations, an analytical formulation is derived for the equivalent currents on an anisotropic material backed by a metal surface, and the relation between two currents is also considered. These expressions are degenerated into the common forms for some simple cases. This effort will provide the theoretical preparation for the approximate calculation of electromagnetic scattering from a conducting object coated by an anisotropic material.

关键词： Radar absorbing material Anisotropic Equivalent currents electromagnetic scattering

New hybridization of PO, SBR, and MoM for scattering by large complex conducting objects

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Journal of Systems Engineering and Electronics 2007年第4期18卷 726-730页

作者： Dong Chunzhu Geng Fangzhi Yin Hongcheng Wang Chao national electromagnetic scattering lab. Beijing 100854 P. R. China Dept. of Electronic Warfare AFRA Wuhan 430019 P. R. China

As a marked extension of the traditional MoM-PO （method of moment-physical optics） hybrid method, a new hybridization of PO, SBR, and MoM （MoM-SBR/PO） is presented to calculate the multireflection contribution in the PO region efficiently by introducing the method of SBR based on RDN notion, which avoids the time-consuming iterative procedure and the choice of proper Green＇s function. As compared with the traditional MoM-PO hybrid method, the calculation efficiency of the proposed method is greatly improved, and its validity is verified by numerical results.

关键词： the method of moment (MoM) physical optics (PO) hybrid method shooting and bouncing ray(SBR) EM scattering radar cross section (RCS)

PO Analysis for RCS of Nonorthogonal Dihedral Corner Reflectors Coated by RAM

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Journal of Systems Engineering and Electronics 2001年第4期12卷 1-6页

作者：殷红成黄培康 national electromagnetic scattering lab.ratory Beijing 100854 P. R. China

The backscattering radar cross section (RCS) of nonorthogonal dihedral corner reflectors coated by RAM (radar absorbing materials) is formulated by the method of PO (physical optics), where singly, doubly, and triply reflected contributions are considered. The final expressions are analytical and allow for the incidence nonperpendicular to the fold axis of the reflector. The results are compared with ones of MoM (method of moment), which shows that the trend of backscatter pattern of the dihedral corner reflector can be well predicted by this method.

关键词： Computer simulation Directional patterns (antenna) Light scattering Method of moments Mirrors Numerical analysis Radar antennas

Comparison between two concepts of angular glint:general considerations

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Journal of Systems Engineering and Electronics 2008年第4期19卷 635-642页

作者： Wang Chao Yin Hongcheng Huang Peikang Information Engineering School Communication Univ. of China Beijing 100024 P. R. China national electromagnetic scattering lab. Beijing 100854 P. R. China

Angular glint can be interpreted as a distortion of the radar echo signal phase front, or alternatively, a tilt of the direction of energy flow from the radial direction. As the complementarities and support of argumentation in our previous work, a general discussion about two concepts of angular glint is made based on electromagnetic theory to demonstrate that these two concepts are equivalent when geometrical optics approximation is used and＇ the receiving antenna is linearly polarized.

关键词： angular glint radar target electromagnetic scattering polarization

Composite scattering from the Electrically Very Large Ship-Sea Model Using the Hybrid High-Frequency Method

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Chinese Physics Letters 2009年第11期26卷 63-65页

作者：罗伟张民周平殷红成 School of Science Xidian University Xi'an 710071 national electromagnetic scattering lab.ratory Beijing 100854

A hybrid high-frequency method is proposed to analyze the bistatic electromagnetic scattering of the ship target on a very large two-dimensional randomly rough sea surface. The scattering of the ship-sea model is evaluated with the method of equivalent currents （MEC）. The iterative physical optics method （IPO） is utilized to study the electromagnetic coupling effect caused by the hull and rough surface. The shadowing correction based on the Z-Buffer technology is introduced to eliminate the effects of the irrelevant scattering resources. The validity of the hybrid method is confirmed by the SAR simulation results and the scattering property of the ship-sea model is discussed.

关键词： Instrumentation and measurement Optics quantum optics and lasers Environmental and Earth science

PO Solution for scattering by the Complex Object Coated with Anisotropic Materials

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Journal of Systems Engineering and Electronics 2003年第2期14卷 1-7页

作者：殷红成黄培康刘学观郭辉萍 national electromagnetic scattering lab.ratory Beijing 100854 P. R. China

The physical optics solution is presented for the calculation of scattering by the complex conducting bodies coated with anisotropic materials, which is based on the tangential plane approximation and the equivalent currents on an anisotropic material backed by an infinite metal surface illuminated by the plane wave given in our previous work. The analytical scheme is proposed to realize fast computation of the solution. Numerical results for several coated bodies such as dihedral corner reflector and cone-cylinder geometry are given and discussed.

关键词： Physical optics electromagnetic scattering Anisotropic materials.

Method of Fundamental Solution for Composite electromagnetic scattering from Two-Dimensional Object Located on a Rough Surface

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Chinese Physics Letters 2010年第1期27卷 115-117页

作者：张民罗伟刘江涛白璐周平 School of Science Xidian University Xi'an 710071 national electromagnetic scattering lab.ratory Beijing 100854

Numerical modeling on the composite electromagnetic （EM） scattering from a two-dimensional （2-D） object located on a rough surface is presented by using the efficient method of fundamental solution （MFS）. The proposed special choice of the MFS is an interesting alternative to the onerous mesh generation in the traditional numerical methods, particularly for the method of moment （MoM）. There is no mesh scheme and singularity analysis, the field to be solved can be obtained directly in terms of the fundamental solutions of the appropriate wave equations. The numerical results are obtained and compared with the traditional MoM results, to demonstrate the accuracy and effectiveness of this technique.

关键词： Chinese climate network complex systems small world community

Effective electromagnetic Parameters and Absorbing Properties for Honeycomb Sandwich Structures with a Consideration of the Disturbing Term

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Chinese Physics Letters 2013年第10期30卷 183-186页

作者： HU Ji-Wei HE Si-Yuan RAO Zhen-Min ZHU Guo-Qiang YIN Hong-Cheng School of Electronic Information Wuhan UniversityWuhan 430072 national electromagnetic scattering lab.ratory Beijing 100854

The interaction between particles cannot be ignored when a high frequency electromagnetic wave is incident on a mixed *** fluctuation theory with correlation function is a suitable method to describe the *** with honeycomb sandwich structures with an absorber included are *** effective electromagnetic parameters and reflection coefficient of these materials are deduced and numerical results are *** with the method with a disturbing term not considered,this method shows better absorbing properties.

关键词： properties absorber method

Light scattering effect of submicro-textured Ag/Al composite films prepared at lower substrate temperatures

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Chinese Physics B 2013年第7期22卷 590-595页

作者：唐平林吴永刚童广德夏子奂刘仁臣梁钊铭周建 Department of Physics Institute of Precision Optical EngineeringTongji University national electromagnetic scattering lab.ratory Institute of No. 802

We present a new and practical approach for preparing submicro-textured silver and aluminum （Ag/Al） double-structured layers at low substrate temperatures. The surface texturing of silver and aluminum double-structured layers was performed by increasing the deposition temperature of the Al layers to 270℃. The highly submicro-textured silver and aluminum double-structured layers were prepared by thermal evaporation on quartz glasses and their surface microstructure, light scattering properties, and thermal stability were investigated. Results showed that the highly submicro-textured Ag/Al composite films prepared at low substrate temperatures used as back reflectors not only can enhance the light scattering and have good thermal stability, but also have good adhesion properties. In addition, their fabrication is low cost and readily carried out.

关键词： random submicro-textured Ag/Al composite films light scattering