Helix antenna array based on higher symmetries for antenna miniaturization and mutual coupling reduction

This document presents the design of an array of helix antennas in axial mode based on higher symmetries. These higher symmetries permit, for a given frequency, the miniaturization of the antenna. Therefore, an array formed by this kind of miniaturized antennas presents lower mutual coupling among the constituting antennas. A comparison is made between the performance of antenna arrays formed by conventional and glide-and-twist-symmetrical helix antennas. The results show a decrease in mutual coupling in the glide-and-twist-symmetrical helix array, regarding to the conventional helix array, for the same element spacing. Moreover, better radiation performance is achieved in terms of directivity and gain in the miniaturized helix array.