Understanding EN 301 893 for 5 GHz Wireless Devices
Wireless Access Systems (WAS), including Radio Local Area Network (RLAN) equipment such as Wi-Fi access points, routers, bridges, and mesh systems, commonly operate within portions of the 5 GHz spectrum throughout Europe. To demonstrate compliance with the Radio Equipment Directive (RED) 2014/53/EU, these devices are typically evaluated against ETSI EN 301 893, the harmonized standard governing 5 GHz WAS/RLAN operation.
EN 301 893 establishes technical requirements designed to ensure efficient use of radio spectrum while protecting other authorized users operating in the same frequency bands. One of the standard’s primary objectives is to enable spectrum sharing through mechanisms such as Dynamic Frequency Selection (DFS), Transmit Power Control (TPC), and spectrum access requirements that promote fair and efficient channel utilization.
Understanding the requirements of EN 301 893 is essential for manufacturers seeking CE marking and market access within the European Economic Area.
What Is EN 301 893?
ETSI EN 301 893 is the harmonized European standard that specifies radio requirements for 5 GHz Wireless Access Systems (WAS), including Radio Local Area Networks (RLANs).
The standard applies to a broad range of wireless products, including:
- Wi-Fi 5 (IEEE 802.11ac) devices
- Wi-Fi 6 (IEEE 802.11ax) devices operating in applicable 5 GHz bands
- Enterprise access points
- Wireless bridges
- Mesh networking equipment
- Industrial wireless systems
- Consumer networking products
Compliance with EN 301 893 demonstrates that a device uses radio spectrum efficiently and can coexist with other authorized users operating within the same frequency ranges.
Frequency Bands Covered by EN 301 893
EN 301 893 defines requirements for operation within several 5 GHz sub-bands:
| Sub-Band | Frequency Range |
| Sub-Band 1 | 5150 MHz – 5250 MHz |
| Sub-Band 2 | 5250 MHz – 5350 MHz |
| Sub-Band 3 | 5470 MHz – 5725 MHz |
In addition, Annex B of the standard addresses operation in:
| Additional Band | Frequency Range |
| Sub-Band 4 | 5725 MHz – 5850 MHz |
National implementation requirements may vary for operation within Sub-Band 4.
Each sub-band contains specific technical requirements related to power limits, spectrum access, and interference mitigation.
Dynamic Frequency Selection (DFS)
Dynamic Frequency Selection (DFS) is one of the most important compliance requirements within EN 301 893.
DFS is designed to protect incumbent radar systems operating within portions of the 5 GHz spectrum while also promoting efficient spectrum sharing among wireless devices.
When operating within DFS-designated bands, a device must monitor channels for radar activity before transmission and continue monitoring while operating. If radar signals are detected, the device must cease operation on the affected channel and move to an alternative channel within specified time limits.
DFS requirements apply to channels operating wholly or partially within:
- Sub-Band 2 (5250 MHz – 5350 MHz)
- Sub-Band 3 (5470 MHz – 5725 MHz)
DFS is not required for operation within Sub-Band 1.
Why DFS Is Required
Several critical services operate within portions of the 5 GHz spectrum, including:
- Weather radar systems
- Aviation radar systems
- Military radar systems
- Maritime radar systems
Without DFS mechanisms, wireless devices could create harmful interference to these services.
In addition to radar detection requirements, EN 301 893 also includes spectrum sharing provisions intended to promote near-uniform loading of available channels. These requirements help prevent excessive concentration of devices on a limited number of frequencies and improve overall spectrum efficiency.
Transmit Power Control (TPC)
Transmit Power Control (TPC) is another important mechanism addressed within EN 301 893.
TPC allows a device to operate across a defined transmit power range, reducing transmitted power when maximum output power is not required. The objective is to improve spectrum sharing, reduce interference potential, and increase overall spectrum efficiency.
Depending on device design and operating conditions, manufacturers may need to demonstrate compliance with applicable TPC-related requirements defined within the standard.
EN 301 893 Test Requirements
A typical EN 301 893 compliance evaluation may include assessment of:
| RF Output Power |
| Verification that conducted and radiated power levels remain within applicable limits for the operating band. |
| Power Spectral Density (PSD) |
| Measurement of transmitted power distribution across the occupied channel bandwidth. |
| Occupied Bandwidth |
| Verification that emissions remain within the intended channel characteristics. |
| Transmitter Unwanted Emissions |
| Evaluation of unwanted emissions occurring outside the assigned operating band. |
| Receiver Spurious Emissions |
| Assessment of emissions generated by the receiver section of the device. |
| Dynamic Frequency Selection (DFS) |
| Verification of radar detection performance, channel availability checks, channel move times, and non-occupancy requirements. |
| Transmit Power Control (TPC) |
| Evaluation of power control functionality where applicable. |
| Receiver Performance |
| Assessment of receiver robustness in the presence of adjacent channel and blocking signals. |
Common EN 301 893 Compliance Challenges
Manufacturers frequently encounter difficulties in several areas.
| DFS Detection Performance |
| Radar detection remains one of the most common causes of compliance failures. Products must successfully detect multiple radar waveform types under controlled test conditions. |
| Firmware Configuration Errors |
| Incorrect regional settings may result in operation on unauthorized channels or at power levels exceeding regulatory limits. |
| Antenna Modifications |
| Changes in antenna gain can affect Equivalent Isotropically Radiated Power (EIRP) calculations and may require additional evaluation. |
| Incomplete DFS Implementation |
| A device may successfully meet RF transmitter requirements yet still fail compliance if DFS functionality does not perform correctly during testing. |
| Multi-Radio Devices |
| Products supporting simultaneous operation of Wi-Fi, Bluetooth, cellular, or other wireless technologies may require additional assessment to demonstrate continued compliance. |
EN 301 893 vs FCC Part 15E
Although EN 301 893 and FCC Part 15E both govern operation within portions of the 5 GHz spectrum, the requirements are not identical.
Differences may include:
- Available frequency bands
- DFS test methodologies
- Radar waveform definitions
- Power limits
- Certification processes
- Regional operating restrictions
Manufacturers targeting both North American and European markets should evaluate compliance requirements for each regulatory framework early in the product development cycle.
How MiCOM Labs Supports EN 301 893 Compliance
MiCOM Labs provides testing and certification support for manufacturers seeking access to European markets for 5 GHz wireless products.
Our services include:
- EN 301 893 compliance testing
- RED compliance evaluations
- DFS assessments
- RF pre-compliance testing
- Technical documentation review
- Global market access support
Early evaluation of EN 301 893 requirements can help identify compliance risks, reduce redesign efforts, and streamline certification timelines.
Conclusion
ETSI EN 301 893 establishes the technical framework for 5 GHz Wireless Access Systems operating within Europe. Through requirements such as Dynamic Frequency Selection, Transmit Power Control, and spectrum sharing mechanisms, the standard helps ensure efficient use of radio spectrum while protecting incumbent users from harmful interference.
Manufacturers that understand and address EN 301 893 requirements early in development are better positioned to achieve successful certification and accelerate access to European markets.