Noise in metamaterials

作者：Syms R R A^*; Solymar L

来源：Journal of Applied Physics, 2011, 109(12): 124909.

DOI：10.1063/1.3600071

Metamaterials made up of resonant elements containing lossy metallic conductors will invariably give rise to Johnson noise. A model based on nearest neighbor interaction of magnetically coupled elements is shown to predict the propagation of noise waves and the excitation of resonances in regular arrays. The power spectral density (PSD) of the noise is calculated for rectangular arrays of different dimension. It is shown that the effect of coupling is to alter the PSD, leaving the noise bandwidth unaltered. The implications for passive and active devices are examined using the simple model of a lossy one-dimensional interconnect with distributed parametric amplification, and it is shown that the improvements to the noise factor offered by amplification are limited.

• 出版日期2011-6-15