Basic Concepts of Active Dispersionless Metamaterial based on Non-Foster Elements (CROSBI ID 569625)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Hrabar, Silvio ; Krois, Igor ; Bonic, Ivan ; Kiricenko, Aleksandar
engleski
Basic Concepts of Active Dispersionless Metamaterial based on Non-Foster Elements
Recently introduced concept of active non-Foster metamaterial is reviewed with an emphasis on the counterintuitive background physics. A basic building block of this active metamaterial is an active ‘tank circuit’ that contains both conventional reactance and non-Foster negative reactance. It is shown that active metamaterial is stable if equivalent permittivity or permeability is arbitrarily small but positive number (ENZ or MNZ metamaterial). It is also shown that this metamaterial may be extremely broadband (several octaves) with almost no dispersion. The propagation within the operating band may support counter-intuitive superluminal phase and group velocities. However, causality is always preserved due to finite bandwidth of any realistic non-Foster element. Several illustrative examples of practical 1D and 2D active ENZ metamaterials developed at University of Zagreb are presented.
superluminal; metamterial; non-Foster
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Podaci o prilogu
S03P05-1-S03P05-4.
2010.
objavljeno
Podaci o matičnoj publikaciji
Proceedings on 20th International Conference on Applied Electromagnetics and Communications 2010
Bonefacic, Davor ; Bosiljevac, Marko
Zagreb: Hrvatsko društvo za komunikacije, računarstvo, elektroniku, mjerenja I automatiku (KoREMA)
978-953-6037-58-2
Podaci o skupu
20th International Conference on Applied Electromagnetics and Communications
pozvano predavanje
20.09.2010-23.09.2010
Dubrovnik, Hrvatska