02-radio-and-frequency-guide
Drone Radio and Frequency Guide
BLUF
Drone RF is a collection of links with different purposes, not one universal drone frequency. Exact bands, channel plans, power limits, modes, and permitted use depend on the model, country, firmware configuration, and radio regulator. Use the manufacturer documentation and the applicable regulator as the source of truth.
Link types
| Link | Purpose | Common implementation patterns | Safe learning question |
|---|---|---|---|
| Command and control | Pilot commands and aircraft acknowledgement | Proprietary digital links; consumer systems commonly use unlicensed 2.4 GHz and/or 5 GHz spectrum where permitted | How does the system report degraded link or lost link? |
| Telemetry | Health, position, modes, battery, mission state | Often carried with the control link or a separate approved data radio | Which fields are visible to the operator? |
| Video | Live pilot or payload video | Proprietary digital video; some systems use 2.4 GHz or 5 GHz spectrum where permitted | What is the difference between video quality and control-link health? |
| Remote ID | Broadcast identification and location information where required | Broadcast technologies such as Bluetooth or Wi-Fi modes, depending on compliant equipment and jurisdiction | What information is intended for awareness versus command? |
| GNSS receive | Navigation and timing reception | Receive-only satellite-navigation signals | What happens when navigation confidence is reduced? |
| Cellular or satellite backhaul | Optional beyond-line-of-sight or fleet connectivity | Carrier or service-provider managed links | Who owns the service, data path, and authorization? |
Common RF neighborhoods: orientation only
| Spectrum neighborhood | Why it appears in drone discussions | Important caveat |
|---|---|---|
| 2.4 GHz | Widely used unlicensed spectrum; many consumer control/video systems and Wi-Fi/Bluetooth devices occupy it | Crowded spectrum. A label or app selection is not authorization to transmit on any particular channel. |
| 5 GHz / 5.8 GHz | Commonly discussed for higher-bandwidth consumer video/control systems | Regulatory treatment changes by exact sub-band and country; do not collapse all 5 GHz spectrum into one rule. |
| Sub-GHz ISM-style bands | Used by some approved long-range telemetry or control products | Region-specific allocations and duty-cycle or power rules can be material. |
| GNSS bands | Satellite navigation receivers use protected radionavigation spectrum | Receive-only navigation is not a license to simulate, rebroadcast, or interfere with GNSS. |
Receive-first safety rules
- Passive observation of your own equipment or lawful sample recordings is the default.
- Never jam, spoof, replay, or inject into aircraft, navigation, or control links.
- Do not infer a protocol or a device identity from energy on a waterfall alone.
- Treat transmit-capable SDR hardware as transmit-blocked unless authority, frequency privileges, containment, and test-plan approval are all present.
- For a specific product, record the model, region, firmware, antenna configuration, and manufacturer-stated band before making any RF claim.
Practical learning exercise without transmitting
Using an owned drone manual or official product page, build a one-page link inventory: link purpose, stated band, stated region, failsafe behavior, and source URL. Mark every unknown as needs validation.