Application of a woodpile superstrate for directivity enhancement of antennas

F. Frezza ^[2] ; L. Pajewski ^[1] ; S. Paulotto ^[2] ; C. Pont ^[1] ; G. Schettini ^[1]
1. [1] Roma Tre University
  
  Roma Tre University
  
  Roma Capitale, Italia
2. [2] “La Sapienza” University
Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 27, Nº 6 (Special Issue: 3rd Edition Italian Finite Element Method), 2008, págs. 1219-1226
Idioma: inglés
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Resumen
- 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.