What Is UWB — RED?
UWB testing is a set of experiments in which the device using ultra-wideband technology is measured in terms of average and peak power density, band edge emissions and the operation of mitigation techniques (LDC, DAA) where applicable.
Purpose of UWB — RED
The aim is to verify that the UWB device operates within power density limits that will not cause interference to other radio services.
Which Products Is UWB — RED Applied To?
- Keyless access and positioning tags
- Smartphone UWB modules
- Industrial indoor positioning systems
- Radar-based detection devices
In Which Sectors Is UWB — RED Used?
Standards Related to UWB — RED
- REDEU radio equipment directive test
- ETSIEuropean telecommunications standards test
- FCCUS radio and EMC regulations test
UWB — RED Conditions
- Bant
- UWB bands defined by application and market (typically 6–9 GHz range)
- Quantities measured
- Average power spectral density (dBm/MHz), peak power, band edge emissions
- Azaltma teknikleri
- Verification of low duty cycle (LDC) and sense-avoid (DAA) behavior
- Measurement settings
- Detector types with standard-defined resolutions and video bandwidths
Equipment for UWB — RED
- semi-reflective room
- Broadband spectrum analyzer
- Caliber broadband antenna set
- Power density measurement and integration software
Sample Requirements for UWB — RED
- The device must support continuous transmission mode
- Antenna positions and orientations should be scanned
- Applicable mitigation techniques must be effective
- Final software and enclosure must be used
Duration of UWB — RED
Typically 1–3 weeks depending on coverage.
UWB — RED Procedure
- 1The device is put into transmission mode.
- 2Average power spectral density is measured with standard settings.
- 3Peak power is measured.
- 4Band edge and out-of-band emissions are scanned.
- 5The operation of mitigation techniques is verified.
- 6Results are compared with the limits.
UWB — RED Acceptance Criteria
The acceptance criteria are the power spectral density and peak power limits given in the applied standard.
Evaluation of Results
Measurement settings (resolution bandwidth, detector, averaging) directly determine the result; If the settings defined in the standard are exceeded, the result is invalid. European and US borders and band plans are different.
UWB — RED Report
- Applied standard and market
- Device and antenna description
- Measurement settings
- Power density and emissions results
- Mitigation technique verification
Accreditation
EUROLAB holds internationally recognised accreditation obtained from accreditation bodies party to the IAF and ILAC multilateral recognition arrangements, under ISO/IEC 17025 for laboratory testing, ISO/IEC 17020 for inspection and surveillance, and ISO/IEC 17021-1 and ISO/IEC 17065 for system and product certification. This chain ensures the reports and certificates issued are accepted worldwide.
Whether this test can be offered within accredited scope depends on your product and the standard applied; since accreditation is method-based, the scope is confirmed in writing at the quotation stage.
Scope and authorisationsRelated Regulations
- Radio Equipment Directive 2014/53/EU (RED)
- FCC Part 15 Subpart F
RF and Wireless Testing — What Does This Testing Field Cover?
The section below describes the field that the UWB test belongs to; the conditions and acceptance criteria of this particular test are given in the sections above. The scope specific to your product is confirmed in writing at the quotation stage.
RF and wireless testing shows that a device containing a radio uses the spectrum correctly and operates within the limits the relevant legislation allows. This family is a separate body of work from EMC: EMC addresses unwanted interference, whereas here INTENTIONAL emission is assessed.
Spectrum is a public and limited resource, and this determines the legal character of the field. A device spilling outside its permitted band or emitting excess power is not merely a technical defect but a violation that disrupts someone else's service. Radio conformity is therefore policed more strictly than other test fields and markets maintain their own national regimes.
Measurements run separately on the transmitter and receiver sides. On the transmitter side, output power, occupied bandwidth, frequency error, unwanted emissions, adjacent channel power and the power envelope are measured. On the receiver side, sensitivity, selectivity, blocking and spurious response rejection are assessed. The receiver side is often neglected, but in some bands it is a regulatory requirement.
Access protocol specific behaviours are a third axis: listen before talk (LBT), duty cycle, dynamic frequency selection (DFS) and transmit power control (TPC). These mechanisms enable spectrum sharing and it must be shown that they work correctly.
HUMAN EXPOSURE is the fourth axis and one of the most commercially critical. For devices used close to the body, SAR (specific absorption rate) is measured; for devices used at a distance, a field strength assessment is made. Limits and measurement methods vary by market; the same device is assessed separately for Europe and the United States.
Market regimes are decisive in this family and do not substitute for one another: the Radio Equipment Directive and ETSI harmonised standards in Europe, FCC authorisation in the United States (through a TCB for intentional radiators), ISED in Canada, MIC in Japan, KC in South Korea and SRRC in China each carry their own set of requirements. The same device requires a separate file for each market, and some markets impose a local representative or local testing requirement.
Module integration is the subject that raises the most questions in the field. Using a certified radio module does not automatically make the device compliant. A module certificate is valid for a defined antenna, a defined supply and defined conditions of use; if the antenna changes, the layout changes or the module is operated at a different power level, reassessment is required.
The presence of several radios in the same device (Wi-Fi + Bluetooth + cellular + NFC) gives rise to a simultaneous transmission assessment: SAR and unwanted emission measurements are made for the worst case in which the radios operate together.
Method groups in this field
Transmitter measurements
Output power, occupied bandwidth, frequency error, unwanted emissions, adjacent channel power, power spectral density.
Receiver measurements
Sensitivity, selectivity, blocking, spurious response rejection.
Spectrum sharing mechanisms
Verification of listen before talk, duty cycle, dynamic frequency selection and transmit power control.
Human exposure
SAR measurement (handheld and body-worn devices), field strength assessment, multi-radio scenarios.
Protocol conformity
Cellular network conformity testing, Bluetooth and Wi-Fi certification testing, GNSS performance.
Antenna measurements
Gain, radiation pattern, efficiency and total radiated power (TRP) measurements.
Commonly confused in this field
- Using a certified module does not automatically make the device compliant; if the antenna, layout or power level changes, reassessment is required.
- An FCC file does not replace a CE file; each market operates its own regime.
- Receiver side measurements are a regulatory requirement in some bands; measuring only the transmitter produces an incomplete file.
- SAR limits and measurement methods differ by market; a result in one market does not carry over to another.
- For devices carrying several radios the simultaneous transmission scenario must be assessed; measuring them individually is not sufficient.
- Some markets impose local testing or a local representative requirement; technical conformity alone does not secure market access.
Which decisions these results support
- Market access under radio equipment legislation
- Verification of the antenna and RF front end design
- SAR and RF exposure conformity
- Verification of module integration and the scope of reassessment
- Determining the worst case in multi-radio scenarios
Related Tests
Frequently Asked Questions About UWB — RED
According to which standard is UWB made?
UWB is executed in scope EN 302 065 serisi, FCC Part 15 Subpart F, IEEE 802.15.4z, ETSI EN 302 065-2 / -3 (according to application), RED, ETSI and FCC. The limit values and acceptance criteria to be applied are defined in the product standard; The version valid for your product is confirmed in writing at the offer stage.
Which products does UWB apply to?
Mainly applied to Keyless access and positioning tags, Smartphone UWB modules, Industrial indoor positioning systems and Radar-based detection devices. Whether your product is included in the scope is determined by examining its technical specifications and intended use.
Under what conditions is UWB done?
The determining parameters are: Bant — UWB bands defined by application and market (typically 6–9 GHz range), Quantities measured — Average power spectral density (dBm/MHz), peak power, band edge emissions and Azaltma teknikleri — Verification of low duty cycle (LDC) and sense-avoid (DAA) behavior. The full terms are in the "Test Conditions" section on the page and vary depending on the product standard.
What kind of sample is needed for UWB?
The device must support continuous transmission mode, Antenna positions and orientations should be scanned and Applicable mitigation techniques must be effective. The number of samples is determined according to the product standard and the scope to be reported.
How long does UWB take?
Typically 1–3 weeks depending on coverage. This duration belongs to the experiment itself; sample preparation, queuing and reporting are also evaluated. A realistic schedule for your product is given in the offer.
What is the UWB result called "appropriate"?
The acceptance criteria are the power spectral density and peak power limits given in the applied standard.