Influence of Dielectric Overlay Dimensions on Performance of Miniaturized ESPAR Antenna

In this paper, the influence of dielectric overlay size on miniaturized ESPAR antenna performance has been investigated. The dielectric overlay’s main function is antenna’s size reduction but it can also be used to modify its radiation pattern. This creates the possibility of easy adopting antenna parameters to different applications by swapping used overlay. In particular, the lowering of antenna’s main beam elevation direction has been considered. By using selected alternative overlay one can obtain a 20° lower beam. The design was confirmed by realization and measurements. Research leading to these results has received funding from the EU ECSEL Joint Undertaking under grant agreement n° 826452 (project Arrowhead Tools) and from the partners national funding authorities the National Centre for Research and Development on behalf of on behalf of the Ministry of Science and Higher Education in Poland. The document reflects only the authors' view and the Commission is not responsible for any use that may be made of the information it contains