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Trapped mode resonances in metalo-dielectric structures with electric asymmetry materials

Rotaru M.D., Sykulski J.K.

Archives of Electrical Engineering

2011

Vol. 60, nr 1

85-93

This paper investigates the possibility of exciting high quality trapped resonant modes on frequency selective surfaces consisting of identical sub-wavelength metallic inclusions (symmetrically split rings) with no structural asymmetry but exhibitting electrical asymmetry. The electrical symmetry is broken by using different dielectric substrates. The existence of such anti-symmetric trapped mode on geometrical symmetric structure is demonstrated through numerical simulation. Numerical results suggest that the high quality factor observed for these resonant modes is achieved via weak coupling between the "trapped modes" and free space which enables the excitation of these modes.

Dual-band electromagnetic band gap structure for noise isolation in mixed signal SiP

Rotaru M. D., Sykulski J. K.

Przegląd Elektrotechniczny

2010

R. 86, nr 5

95-99

A compact dual-band electromagnetic band-gap (EBG) structure is proposed. It is shown through numerical simulation using 3D full wave solver that by adding a slit to the classical mushroom shape an extra resonance is introduced and thus dual-band EBG structures can be built by cascading these new elements. It is also demonstrated that this novel approach can be used to isolate noise in a system such as a dual band transceiver integrated into a mixed signal system in a package. Finally, equivalent circuits have been established to aid the design process.

Przedmiotem pracy jest struktura z przerwą elektromagnetyczną (Electromagnetic Band-gap). Przeprowadzono analizę przy pomocy symulacji falowej 3D dodając dodatkową szczelinę do klasycznego kształtu grzyba i uzyskując dzięki temu dodatkowy rezonans. Pokazano, że nowe rozwiązanie może być używane do izolowania zakłóceń.