QuadRF Kit Lets You See Wi-Fi Through Walls and Track Drones
QuadRF brings a phased-array RF visualization capability that was previously the domain of expensive lab equipment into a $499 hobbyist kit, making the invisible world of wireless signals observable and trackable by anyone with a Raspberry Pi.
Reporting from 1 source: GIGAZINE.
QuadRF is a software-defined radio kit powered by a Raspberry Pi 5 and an FPGA board that visualizes wireless signals. Developed by Martin McCormick, the device can detect Wi-Fi signals through walls and track drones by their RF emissions. YouTuber Jeff Geerling tested a prototype, showing real-time visualization on a screen. The QuadRF is available for pre-order on Crowd Supply at $499, but requires adherence to radio transmission laws.
The QuadRF board uses MIPI, a high-speed interface normally used for Raspberry Pi cameras, to achieve data rates above 5 Gbps. Its four patch antennas operate in the 4.9 GHz to 6.0 GHz band. In practice, Geerling demonstrated the device by pointing it at a smartphone running a speed test, which showed RF signals on a PC screen. He also detected Wi-Fi signals emanating from behind a wall and tracked a drone's position outdoors. The basic kit costs $499, but users must comply with local radio regulations when transmitting.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.