Purpose - The purpose of this paper is to investigate the role of electromagnetic band-gap (EBG) materials in the enhancement of antennas' directivity. Design/methodology/approach - An analysis of a woodpile EBG material is performed, which points out its band properties. Woodpile cavities. are then considered, obtained by interrupting the periodicity of the crystal. A woodpile cavity is then superimposed to a double-slot antenna, resulting in a compound radiating device. The behavior of the EBG and of the radiating structure are simulated through Ansoft HFSS V11. Findings - The woodpile EBG, when used as a cavity, acts as a spatial filter for. the radiation coming from the antenna. The directivity of the new radiator is considerably increased, since now the illumination covers an area larger than the antenna. Originality/value - Using new materials to obtain high-directivity and compact radiators.
Application of a woodpile superstrate for directivity enhancement of antennas / Frezza, Fabrizio; Pajewski, Lara; S., Paulotto; C., Ponti; G., Schettini. - In: COMPEL. - ISSN 0332-1649. - 27:6(2008), pp. 1219-1226. (Intervento presentato al convegno Italian Workshop on Finite Element Methods as Applied to Electrical and Information Engineering tenutosi a Rome, ITALY nel DEC 14, 2007) [10.1108/03321640810905701].
Application of a woodpile superstrate for directivity enhancement of antennas
FREZZA, Fabrizio;PAJEWSKI, Lara;
2008
Abstract
Purpose - The purpose of this paper is to investigate the role of electromagnetic band-gap (EBG) materials in the enhancement of antennas' directivity. Design/methodology/approach - An analysis of a woodpile EBG material is performed, which points out its band properties. Woodpile cavities. are then considered, obtained by interrupting the periodicity of the crystal. A woodpile cavity is then superimposed to a double-slot antenna, resulting in a compound radiating device. The behavior of the EBG and of the radiating structure are simulated through Ansoft HFSS V11. Findings - The woodpile EBG, when used as a cavity, acts as a spatial filter for. the radiation coming from the antenna. The directivity of the new radiator is considerably increased, since now the illumination covers an area larger than the antenna. Originality/value - Using new materials to obtain high-directivity and compact radiators.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
