This paper presents the study of a novel design of a miniaturized GNSS antenna for E5a and E1 bands (i.e. at the central operating frequencies of 1.176 and 1.575 GHz) with high gain and very low back lobe for multipath reduction in high end static (e.g. geodesy) or dynamic (e.g. UAV) environments. The antenna itself is 56 mm in diameter and has a vertically stacked appurtenance of approximately 160 mm diameter that forces the cancellation of electromagnetic fields underneath the ground plane, thereby drastically improving the cross polarization discrimination and allowing for multipath suppression in both bands of operation.

Nowadays, an increasing trend to use autonomous Unmanned Aerial Vehicles (UAV) for applications like logistics as well as security and surveillance can be recorded. Autonomic UAVs require robust and precise navigation to ensure efficient and safe operation even in strong multipath environments and (intended) interference. The need for robust navigation on UAVs implies the necessary integration of lowcost, lightweight, and compact array antennas as well as structures for multipath mitigation into the UAV platform. This article investigates a miniaturized antenna array mounted on top of vertical choke rings for robust navigation purposes. The array employs four 3D printed elements based on dielectric resonators capable of operating in all GNSS bands while compact enough for mobile applications such as UAV.

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