This communication compares two different methods for the directivity enhancement of antennas bymeans of electromagnetic band-gap (EBG) structures. The first approach employs an EBG material working inside the band-gap to create a resonator, where a radiator is placed in between a groundplane and the EBG cover. The secondmechanism adopts an EBG structure, working at the edge of the band-gap and embedding a radiating source to excite a proper Bloch wave. The methods are benchmarked in terms of directivity with reference to several optimized two-dimensional configurations, based on either square or triangular lattices of dielectric rods. For a set of selected configurations, the comparison is carried out in terms of electrical and geometrical parameters, as well as with respect to their frequency behaviour and efficiency. The resonator antenna achieves the highest directivity, but it turns out to be less efficient and is outranked by the other method when few rods per layer are employed. Strengths and weaknesses of the two approaches are fully discussed together with their generalization beyond the particular cases. © 2014 IEEE.

Directive EBG antennas: A comparison between two different radiating mechanisms / Ceccuzzi, Silvio; Pajewski, Lara; Ponti, Cristina; Schettini, Giuseppe. - In: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION. - ISSN 0018-926X. - STAMPA. - 62:10(2014), pp. 5420-5424. [10.1109/TAP.2014.2346174]

Directive EBG antennas: A comparison between two different radiating mechanisms

PAJEWSKI, Lara;
2014

Abstract

This communication compares two different methods for the directivity enhancement of antennas bymeans of electromagnetic band-gap (EBG) structures. The first approach employs an EBG material working inside the band-gap to create a resonator, where a radiator is placed in between a groundplane and the EBG cover. The secondmechanism adopts an EBG structure, working at the edge of the band-gap and embedding a radiating source to excite a proper Bloch wave. The methods are benchmarked in terms of directivity with reference to several optimized two-dimensional configurations, based on either square or triangular lattices of dielectric rods. For a set of selected configurations, the comparison is carried out in terms of electrical and geometrical parameters, as well as with respect to their frequency behaviour and efficiency. The resonator antenna achieves the highest directivity, but it turns out to be less efficient and is outranked by the other method when few rods per layer are employed. Strengths and weaknesses of the two approaches are fully discussed together with their generalization beyond the particular cases. © 2014 IEEE.
2014
Directive antennas; Electromagnetic bandgap materials; Periodic structures; Electrical and Electronic Engineering; Condensed Matter Physics
01 Pubblicazione su rivista::01a Articolo in rivista
Directive EBG antennas: A comparison between two different radiating mechanisms / Ceccuzzi, Silvio; Pajewski, Lara; Ponti, Cristina; Schettini, Giuseppe. - In: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION. - ISSN 0018-926X. - STAMPA. - 62:10(2014), pp. 5420-5424. [10.1109/TAP.2014.2346174]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/936474
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