Naslov
Basic Concepts of Active Dispersionless Metamaterial based on Non-Foster Elements

Autori
Hrabar, Silvio ; Krois, Igor ; Bonic, Ivan ; Kiricenko, Aleksandar

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
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), 2010, S03P05-1

ISBN
978-953-6037-58-2

Skup
20th International Conference on Applied Electromagnetics and Communications

Mjesto i datum
Dubrovnik, Hrvatska, 20.09.2010. - 23.09.2010

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
superluminal; metamterial; non-Foster

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA