Aviation Frequency Guide
Aviation Frequencies Overview
| Frequency | Protocol | Region | Primary Users | Stratux |
|---|---|---|---|---|
| 1090 MHz | ADS-B ES / Mode S | Worldwide | Commercial aircraft, IFR traffic, jets, airliners | ✓ All models |
| 978 MHz | UAT (ADS-B) | USA only | GA aircraft below FL180, drones | US firmware only |
| 868.2 MHz | FLARM / OGN / ADS-L | Europe, Africa | Gliders, ultralights, GA, paragliders | ✓ All EU models |
| 868.4 MHz | FANET | Europe | Paragliders, hang gliders, free flight | ✓ EU models with FANET support |
| 915 MHz | FLARM (Americas/AU) | USA, Australia, NZ, South America | Same as 868 MHz but regional | US/AU firmware |
| 869.525 MHz | PilotAware (P3I) | UK, Ireland | UK electronic conspicuity devices | ✓ EU models |
Why Stratux Uses Dual SDR Receivers
Software Defined Radio (SDR) receivers can only tune to one frequency at a time. Since aviation uses multiple frequency bands simultaneously, Stratux includes two independent SDR modules:
SDR 1 (1090 MHz): Dedicated to receiving ADS-B Extended Squitter and Mode S transponder signals from commercial and IFR traffic. This frequency is used globally.
SDR 2 (868/978 MHz): Configurable for regional protocols. In Europe, this receives FLARM, OGN, ADS-L, FANET, and PilotAware on the 868 MHz band. In the USA, it can be configured for 978 MHz UAT.
This dual-receiver architecture ensures you see the complete traffic picture-from high-altitude airliners to low-flying gliders-without missing any signals.
Antenna Requirements by Frequency
1090 MHz→
Type: 1090 MHz monopole or dipole
Element: ~69mm element
Higher gain antennas improve reception of distant aircraft
868 MHz→
Type: 868 MHz monopole or dipole
Element: ~86mm element
Dual-band 1090/868 antennas available for convenience
2-in-1→
Type: GPS + 868 MHz antenna
Element: Integrated unit
Recommended for clean installation with fewer cables
Regional Frequency Summary
Europe (EU)
Primary: 1090 MHz (ADS-B) + 868 MHz (FLARM/OGN)
Firmware: Stratux EU
Most comprehensive traffic coverage
United States
Primary: 1090 MHz (ADS-B ES) + 978 MHz (UAT)
Firmware: Stratux US
UAT provides FIS-B weather data
Australia/NZ
Primary: 1090 MHz (ADS-B) + 915 MHz (FLARM)
Firmware: Stratux AU
915 MHz FLARM common in gliding community
UK/Ireland
Primary: 1090 MHz + 868 MHz + 869.525 MHz (PAW)
Firmware: Stratux EU
PilotAware popular for EC devices
Frequently Asked Questions
Related Technology Guides
Get Multi-Frequency Stratux
All our Stratux devices include dual SDR receivers pre-configured for your region. Choose EU or US firmware during checkout.
Disclaimer
Stratux is not certified aviation equipment. It does not replace a transponder or relieve the pilot of traffic awareness responsibilities. Use as supplementary situational awareness only. Dross:Aviation assumes no responsibility or liability for the use of Stratux devices, firmware flashing, or hardware modifications. All DIY guides are provided without warranty-use at your own risk.