Commodity 5-RX-channel coherent SDR designed explicitly for radio direction-finding and passive radar. 24 MHz to 1766 MHz tuning range, all 5 channels clocked to a single LO with built-in coherence sync. Open-source DAQ/DSP software runs on a Raspberry Pi 4/5. Active community with a documented open-source DVB-T2 passive-radar drone-detection project. Not a turnkey C-UAS product, but the cheapest credible PCL hardware platform on the market.
| Country | United States |
|---|---|
| Subcategory | RF / SIGINT detection |
| Price | ~$700 retail (hardware only) |
| Subtype | SDR platform |
| Form factor | 5-RX · 24 MHz–1.7 GHz |
| Use | Counter-UAS |
| Type | Passive |
| Sensor modality | Commodity coherent SDR (5-RX) |
| Notable partners | Launched via Crowd Supply; core DSP/DF software open-source on GitHub; founder Syed Karim (ex-Othernet/Outernet); distributed via Mouser |
| Mounting | Vehicle, Tripod/portable |
| Detection mode | Direction-finding (bearing) |
| Identification | 5-channel coherent RTL-SDR; MUSIC and correlative interferometry DF; also passive radar |
| Price band | $10k-50k |
| Architecture | Coherent 5-RX SDR (DF + PCL) |
| Output data | Bearing/AoA |
| Frequency coverage | 24 MHz to 1766 MHz (R820T2) |
| Frequency (GHz) | 0.024–1.766 |
| Active/Passive | Passive |
| Integration interfaces | USB-C; open-source DAQ/DSP on RPi 4/5 or PC; Android/iOS DF apps |