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SCATTERING

散射是被投射波照射的物体表面曲率较大甚至不光滑时,其二次辐射波在角域上按一定的规律作扩散分布的现象。它是分子或原子相互接近时,由于双方具有很强的相互斥力,迫使它们在接触前就偏离了原来的运动方向而分开,这通常称为“散射”。散射是指由传播介质的不均匀性引起的光线向四周射去的现象。如一束光通过稀释后的牛奶后为白色,而从侧面和上面看,却是浅蓝色的。
  • First Paper in Double SCATTERING for MIMO System

    First Paper in Double SCATTERING for MIMO System

    标签: SCATTERING Double System First

    上传时间: 2013-12-20

    上传用户:偷心的海盗

  • Second paper about Double SCATTERING in MIMO Systems

    Second paper about Double SCATTERING in MIMO Systems

    标签: SCATTERING Systems Second Double

    上传时间: 2014-01-12

    上传用户:gxf2016

  • Third Paper About Double SCATTERING in MIMO Systems

    Third Paper About Double SCATTERING in MIMO Systems

    标签: SCATTERING Systems Double Third

    上传时间: 2014-08-19

    上传用户:123啊

  • 差分電路中單端及混合模式S-參數的使用

    Single-Ended and Differential S-Parameters Differential circuits have been important incommunication systems for many years. In the past,differential communication circuits operated at lowfrequencies, where they could be designed andanalyzed using lumped-element models andtechniques. With the frequency of operationincreasing beyond 1GHz, and above 1Gbps fordigital communications, this lumped-elementapproach is no longer valid, because the physicalsize of the circuit approaches the size of awavelength.Distributed models and analysis techniques are nowused instead of lumped-element techniques.SCATTERING parameters, or S-parameters, have beendeveloped for this purpose [1]. These S-parametersare defined for single-ended networks. S-parameterscan be used to describe differential networks, but astrict definition was not developed until Bockelmanand others addressed this issue [2]. Bockelman’swork also included a study on how to adapt single-ended S-parameters for use with differential circuits[2]. This adaptation, called “mixed-mode S-parameters,” addresses differential and common-mode operation, as well as the conversion betweenthe two modes of operation.This application note will explain the use of single-ended and mixed-mode S-parameters, and the basicconcepts of microwave measurement calibration.

    标签: 差分電路 單端 模式

    上传时间: 2014-03-25

    上传用户:yyyyyyyyyy

  • The EM Wave MATLAB Library consists of a collection of MATLAB programs related to electromagnetic wa

    The EM Wave MATLAB Library consists of a collection of MATLAB programs related to electromagnetic wave SCATTERING with special emphasis on wave SCATTERING by random rough surfaces and discrete random media.

    标签: MATLAB electromagnetic collection consists

    上传时间: 2015-09-06

    上传用户:alan-ee

  • 外国人开发的电磁时域有限差分方法工具包 Electromagnetic Finite-Difference Time-Domain (EmFDTD) is a basic two-dimensio

    外国人开发的电磁时域有限差分方法工具包 Electromagnetic Finite-Difference Time-Domain (EmFDTD) is a basic two-dimensional FDTD code developed at the School of Electrical Engineering, Sharif University of Technology. This code has been written based on the standard Yee s FDTD algorithm. Applications include propagation, SCATTERING, and diffraction of electromagnetic waves in homogeneous and non-homogeneous isotropic media for in-plane propagating waves. Negative permittivites or permeabilities as well as dispersion is not included. Zero, Periodic, and Perfectly Matched Layer boundary conditions may be selectively applied to the solution domain. The program is best suited for study of propagation and diffraction of electromagnetic waves in Photonic Crystal structures. EmFDTD is written in MATLAB language and has been tested under MATLAB 5.0 and higher versions.

    标签: Finite-Difference Electromagnetic two-dimensio Time-Domain

    上传时间: 2014-11-24

    上传用户:watch100

  • In an electromagnetic cloak based on a transformation approach, reduced sets of material properties

    In an electromagnetic cloak based on a transformation approach, reduced sets of material properties are generally favored due to their easier implementation in reality, although a seemingly inevitable drawback of undesired reflection exists in such cloaks. Here we suggest using high-order transformations to create smooth moduli at the outer boundary of the cloak, therefore completely eliminating the detrimental SCATTERING within the limit of geometric optics. We apply this scheme to a non-magnetic cylindrical cloak and demonstrate that the scattered field is reduced substantially in a cloak with optimal quadratic transformation as compared to its linear counterpart.

    标签: electromagnetic transformation properties approach

    上传时间: 2017-03-30

    上传用户:pkkkkp

  • DDA使用教程

    DDSCAT 7.3 is a freely available open-source Fortran-90 software package applying the “discrete dipole approximation” (DDA) to calculate SCATTERING and absorption of electromagnetic waves by targets with arbitrary geometries and complex refractive index. The targets may be isolated entities (e.g., dust particles), but may also be 1-d or 2-d periodic arrays of “target unit cells”, which can be used to study absorption, SCATTERING, and electric fields around arrays of nanostructures.

    标签: userguide

    上传时间: 2015-04-29

    上传用户:499689361

  • Multiple-Input+Multiple-Output+Channel+Models

    Many wireless communications channels consist of multiple signal paths from the transmitter to receiver. This multiplicity of paths leads to a phenomenon known as multipath fading. The multiple paths are caused by the presence of objects in the physical environment that, through the mechanisms of propagation, alter the path of radiated energy. These objects are referred to as scatterers. In the past, researchers often looked at ways to mitigate multipath SCATTERING, such as in diversity systems. Multiple-input, multiple-output (MIMO) systems, on the other hand, use multipath diversity to their advantage; a MIMO system has the ability to translate increased spatial diversity into increased channel capacity. 

    标签: Multiple-Output Multiple-Input Channel Models

    上传时间: 2020-05-31

    上传用户:shancjb