Adaptive Switching Strategy of an Aerial Drone’s GNSS Antennas with Metallic Shielding for GNSS Anti-Jamming

This paper presents a simple and cost-effective anti-jamming method for global navigation satellite system (GNSS) antennas of an aerial drone. The drone has three GNSS antennas, such that two antennas exist at distinct heights inside a metallic shielding structure, and one antenna exists outside the shielding structure. To overcome intentional jamming signals from low elevation angles, we designed an autonomous antenna selection method. In the proposed antenna selection method, the most suitable GNSS antenna is dynamically selected to ensure stable satellite signal reception, while blocking the jamming signals from low elevation angles. Experiments were conducted to validate the proposed approach.