The QuadRF, a phased-array radio built around a Raspberry Pi 5 and an FPGA board, has been shown to be capable of spotting drones and seeing WiFi through walls [1]. This is made possible by its advanced signal processing and beamforming capabilities, which allow it to detect and analyze radio signals in its frequency range of 4.9-6 GHz [2]. The QuadRF has built-in software that can stream and decode RF signals, and can be connected to a more powerful computer for further analysis [3]. The implications of this technology are significant, as it could be used for both legitimate and malicious purposes, such as surveillance and hacking [4].
The QuadRF's creator, Martin McCormick, has stated that the technology is intended for use in radio experiments and astronomy, but it is unclear how it will be used in practice [5]. The QuadRF is currently available for pre-order on Crowd Supply, with a basic kit starting at $499 [6]. As with any new technology, it is essential to consider the potential risks and benefits of the QuadRF and to ensure that it is used responsibly.
Sources
- https://www.jeffgeerling.com/blog/2026/quadrf-can-spot-drones-and-see-wifi-through-my-wall
- https://scalerf.com/docs/
- https://www.jeffgeerling.com/blog/2026/quadrf-can-spot-drones-and-see-wifi-through-my-wall
- https://news.ycombinator.com/item?id=48861717
- https://www.jeffgeerling.com/blog/2026/quadrf-can-spot-drones-and-see-wifi-through-my-wall
- https://www.crowdsupply.com/scale-rf/quadrf#products
