Dynamic Beam Steering in a Cavity-Backed Roof-Rack Antenna Array for Enhanced Connectivity in Rural and Remote Areas

A dynamic beamforming system has been developed to enhance vehicular connectivity in rural and remote areas, addressing critical social, economic, and safety challenges. The system features a reconfigurable, roof rack-mounted, ventilated log-periodic antenna (DRV-LPA), providing full 360° azimuthal coverage around the vehicle. Beamforming is implemented on the forward (north) and backward (south) sides, with three LTE and three WiFi antennas per side, enabling dynamic directional control of beams. The DRV-LPA electronically steers its beam from 0° to ±30°, based on electric field theory, and is validated through full-wave electromagnetic simulations. System performance was evaluated with two setups: anechoic chamber measurements and field trials in regional Australia. The system supports three beam configurations θ₁ = 0°, θ₂ = ±30°, and θ₃ = +30°, 0°, -30° adapted to communication needs and vehicle orientation. A compact wireless router integrated with the switching module manages continuous data exchange with a remote base station, ensuring stable connectivity and optimized bandwidth. The switching module dynamically activates the appropriate beam based on the vehicle's position relative to the base station. Simulated and measured results show strong agreement in beam direction, gain, VSWR, and overall performance within the roof rack. Field trials confirm the system's robustness and effectiveness in real-world vehicular scenarios, offering a cost-effective, scalable solution for improving vehicle-based connectivity, enabling precision agriculture, and strengthening rural mobility infrastructure.