Parametric study and design of slot-spiral antennas using an FE-BI antenna code

The wire Archimedean spiral antenna has been analyzed before as a frequency-independent design. However, the conformal slot spiral antenna has not yet received similar attention. In this paper, a parametric study of slot-spiral antennas etched on a planar platform is carried out. These wide-band antennas have controllable radiation patterns and are compact, conformal and light weight. Therefore, they could find many applications in satellite communications and cellular network systems. The specific study for the slot-spiral antennas will be carried out at frequencies for cellular and GPS operations, and a finite element-boundary integral (FE-BI) antenna code will be used for the analysis. In this study, we will consider the performance of the slot-spiral design in terms of its gain and CP purity as a function of the substrate cavity depth and the spiral geometry.