Resumen de Application of a woodpile superstrate for directivity enhancement of antennas

F. Frezza, L. Pajewski, S. Paulotto, C. Pont, G. Schettini

• 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.