Transmission-Line Model of Noisy Electromagnetic Media

被引：8

作者：

Syms, Richard R. A. ^{[1
]}

Sydoruk, Oleksiy ^{[1
]}

Solymar, Laszlo ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Elect & Elect Engn Dept, London SW7 2AZ, England

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2013年 / 61卷 / 01期

关键词：

Fluctuation-dissipation theorem; Johnson noise; metamaterial; negative index; thermal noise; 3-DIMENSIONAL PHOTONIC-CRYSTAL; EMISSION; RADIATION; MICROWAVE; ENHANCEMENT; CONDUCTORS; NETWORKS; WAVES;

D O I：

10.1109/TMTT.2012.2226742

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A transmission-line model of thermal noise in 1-D electromagnetic (EM) media is presented that can find both the magnetic and the electric contributions to the noise in arbitrary arrangements of isotropic material. The model is used to compute the noise performance of a negative-index metamaterial slab based on split-ring resonators and rods, when magnetic and electric noise are both significant. It is shown that the former rises rapidly in the range when negative index effects are obtained, due to the lossy magnetic resonance. Results for infinite and finite media are compared, and the effect of size is discussed. Results for the slab are also compared with the indirect prediction of standard EM theory, and shown to be identical.

引用

页码：14 / 22

页数：9

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