engleski

Ideal versus Realistic non-Foster Elements in Active Metamaterials

The ‘parasitics’ of realistic non-Foster elements limit performance of recently introduced broadband active metamaterials and associated devices. Here, we present a very simple and clear explanation of this non-ideal behavior, based on the inevitable delay and frequency characteristic of used active component. Finally, it is shown that presented analysis can be used for the design of non-Foster elements with substantially decreased parasitics, which enables practical realization of stable superluminal transmission lines with many unit cells.

non-Foster; negative capacitor; metamaterial

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