Seeing the world in radio waves with the QuadRF
3 hours ago
- #Direction Finding
- #SDR
- #QuadRF
- QuadRF project builds a phase-coherent four-channel SDR to make radio direction finding accessible to hackers.
- Hardware includes two boards: an RF board with four patch antennas (4.9-6.0 GHz, switchable polarization) and a Raspberry Pi 5 for processing, using an ECP5 FPGA and MIPI connections.
- Software is compatible with GNU Radio and features an 'RF camera' that scans frequencies at 30 fps, visualizing signal directions on spatial plots overlaid on camera feeds.
- QuadRF boards can connect in a lattice grid to form larger phased arrays, and it supports transmission, unlike previous multi-antenna SDRs.
- Applications include tracking drones but require caution due to potential arms regulations, with capabilities like high effective radiated power.