Electromagnetic Properties of Disordered Three-Dimensional Mixtures

被引：4

作者：

Pickles, Austin J. ^{[1
]}

Kilgore, Ian M. ^{[1
]}

Steer, Michael B. ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27695 USA

来源：

IEEE ACCESS | 2013年 / 1卷

关键词：

Composites; effective permittivity; electric energy density; electromagnetic propagation; energy localization; hotspot; mixing rules; mixtures; pulsed microwaves; random medium; relative permittivity; transient electromagnetic analysis; EFFECTIVE PERMITTIVITY;

D O I：

10.1109/ACCESS.2013.2292024

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The electromagnetic (EM) properties of two-component mixtures involving many disordered regularly and irregularly shaped crystals are studied. The effective relative permittivities are calculated utilizing the time-domain finite integration technique. The effective permittivity of disordered mixtures deviates from established mixing theories especially in cases of high permittivity contrast between inclusions and matrix material, and is strongly correlated to the cross-sectional area of the inclusion crystals. Electric energy density localizes at the edges and corners of inclusions in a manner independent of inclusion shape and influenced by EM propagation direction and surrounding inclusions. For mixtures with both disordered irregular and more organized cube inclusions, energy localization increases as the EM signal travels through the mixture before decreasing due to attenuation of the propagating EM signal. With a large number of inclusion crystals (here in the hundreds), it is found that the impact on effective permittivity from differences in individual inclusion shapes is negligible.

引用

页码：778 / 788

页数：11

共 24 条

[1]

[Anonymous], 2013, CST Microwave Studio Suite Users Manual.

[2] Calculation of various physics constants in heterogenous substances I Dielectricity constants and conductivity of mixed bodies from isotropic substances [J].

Bruggeman, DAG .

ANNALEN DER PHYSIK, 1935, 24 (07) :636-664

[3]

Cai W, 2010, OPTICAL METAMATERIALS: FUNDAMENTALS AND APPLICATIONS, P1, DOI 10.1007/978-1-4419-1151-3

[4]

Cheng Y., 2008, J APPL PHYS, V103

[5]

Coumans E., 2013, BULLET PHYS LIB

[6] Effective Medium Properties of Arbitrary Nanoparticle Shapes in a Localized Surface Plasmon Resonance Sensing Layer [J].

Dyck, Nathan C. ;

Denomme, Ryan C. ;

Nieva, Patricia M. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (31) :15225-15233

[7] Colours in metal glasses and in metallic films. [J].

Garnett, JCM .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-CONTAINING PAPERS OF A MATHEMATICAL OR PHYSICAL CHARACTER, 1904, 203 :385-420

[8]

Hsu-Hsiang Wu, 2008, 2008 IEEE MTT-S International Microwave Symposium Digest - MTT 2008, P1349, DOI 10.1109/MWSYM.2008.4633027

[9] Numerical modeling of disordered mixture using pseudorandom simulations [J].

Jylhä, L ;

Sihvola, AH .

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2005, 43 (01) :59-64

[10] Analysis of a three-dimensional dielectric mixture with finite difference method [J].

Kärkkäinen, K ;

Sihvola, A ;

Nikoskinen, K .

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2001, 39 (05) :1013-1018

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