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3 days ago
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An open-source communications hardware & software initiative empowering the public to connect across the world by bouncing signals off the Moon—and more!
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A New Frontier for Ham Radio
Bouncing signals off the Moon—known as Earth-Moon-Earth (EME) communication—has long been the ultimate challenge for radio amateurs. It required large antennas, expensive equipment, and accurate manual pointing and tracking. We try to bring this down to Earth, providing all the tools needed to experience the thrill of space communication, with an open source software-defined phased array.
Open-Source Hardware
Expected to ship: March 2026.
Our first kit is a low-cost digital phased array, with high transmit power and excellent receive sensitivity. It supports flexible transmission modes across any 40 MHz bandwidth in the C-band (4.9–6 GHz).
Overview
This 4-antenna SDR tile designed for arraying. Drop-in compatible with
Raspberry Pi pipelines (GNU Radio, Python/C++, SoapySDR) .
Useful as a standalone SDR or as a building block for larger phased arrays.
Key features
- Frequency: 4.9–6.0 GHz (C-band), full duplex
- Per-antenna bandwidth: 40 MHz; 8+8-bit I/Q
- Tx power: 1 W per antenna • Rx NF: ~1.2 dB
- Polarization: RHCP (Tx), LHCP (Rx)
- MEMS TCXO • Jitter ~1.4 ps
- FPGA: Lattice ECP5 • Latency < 1 ms
- Power: 12 V DC (≈25 W peak)
Standalone applications
- General-purpose 4×4 MIMO Software-defined Radio
- Fox-hunting, direction of arrival (DOA), RF exploration
- Open Wi-Fi router, Open 4G/5G base station
- Drone HD links, robotics communications
Overview
A compact, budget-friendly phased array that already delivers substantial directivity. It’s designed for experimentation and hands-on phased-array learning. Add extension boards later to grow the array further.
Applications
- High-gain backhaul and directional links; repeater backhaul
- Fox hunting and geolocation (DOA)
- Mobile field ops, long-range drone telemetry/HD links
- Receive downlinks from low-Earth orbit amateur satellites
Performance & notes
- Array size: 18 tiles (72 antennas) • Beam steering ≈ 60°
- Expected array gain: ~34.0 dBi • EIRP: ~52.6 dBW
- Low-latency beamforming; coherent clocking across Quad tiles
Power supply: 12 V DC (≈450 W peak)
License: 🪪 Amateur Radio (Technician+) to operate, country restrictions apply.
Overview
A high-aperture array built for Earth-Moon-Earth (EME) experiments and radio astronomy. Delivers the beam-forming gain and EIRP needed for moon-bounce.
Applications
- EME (Moon-bounce)—transmit and hear your echo or talk with others
- Milky Way C-band imaging; RF sky surveys
- Terrestrial RF imaging
- Atmospheric and ionospheric sensing experiments
- Advanced phased array research
Performance & notes
- Array size: 60 tiles (240 antennas) • Beam steering ≈ 60°
- Expected array gain: ~39.3 dBi • EIRP: ~63.1 dBW
- Coherent distribution network; timing holdover and GPSDO-ready
Power Supply: 12 V DC (≈1.5 kW peak)
License: 🪪 Amateur Radio (Technician+) to operate. 1 per person. Country restrictions apply.
* Not intended for radar applications. Core functionality needed for radar not included due to export control restrictions.
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Be the first to find out when our hardware launches!
