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A Comparison of Active and Passive Metamaterials from Equivalent Lumped Elements Modes

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DOI: 10.4236/opj.2013.32B061    3,393 Downloads   5,041 Views  

ABSTRACT

With ever-increasing operating frequencies and complicated artificial structures, loss effects become more and more important in applications of metamaterials. Based on circuit theory and transmission line principle, the design equations for effective electromagnetic (EM) parameters (attenuation constant α, phase constant β, characteristic impedance Z0) of general active and passive metamaterial are compared and derived from the equivalent lumped circuit parameters (R, G, LL, CL, LR, CR). To verify the design equations, theα, βand Z0 indifferent cases, including balanced, unbalanced, lossless, passive and active, are shown by numerical simulations. The results show that using the active method can diminish the loss effects. Meantime, it also has influence on phase constant and real part of characteristic impedance.


Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Y. Ge, H. Huang, Y. Liu, H. Sun, X. Lv and L. Si, "A Comparison of Active and Passive Metamaterials from Equivalent Lumped Elements Modes," Optics and Photonics Journal, Vol. 3 No. 2B, 2013, pp. 260-264. doi: 10.4236/opj.2013.32B061.

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