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Application of a woodpile superstrate for directivity enhancement of antennas

F. Frezza (Electronic Engineering Department, “La Sapienza” University, Rome, Italy)
L. Pajewski (Applied Electronics Department, “Roma Tre” University, Rome, Italy)
S. Paulotto (Electronic Engineering Department, “La Sapienza” University, Rome, Italy)
C. Ponti (Applied Electronics Department, “Roma Tre” University, Rome, Italy)
G. Schettini (Applied Electronics Department, “Roma Tre” University, Rome, Italy)

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering

ISSN: 0332-1649

Article publication date: 14 November 2008

369

Abstract

Purpose

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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

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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

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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

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Using new materials to obtain high‐directivity and compact radiators.

Keywords

Citation

Frezza, F., Pajewski, L., Paulotto, S., Ponti, C. and Schettini, G. (2008), "Application of a woodpile superstrate for directivity enhancement of antennas", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 27 No. 6, pp. 1219-1226. https://doi.org/10.1108/03321640810905701

Publisher

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Emerald Group Publishing Limited

Copyright © 2008, Emerald Group Publishing Limited

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