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What is UWB? Ultra-wideband (UWB) pinpoints the exact position of a person or asset by timing radio pulses instead of reading signal strength, the same distance-by-timing principle radar and sonar use, just scaled down to a badge or tag. That timing method is what lets a UWB-based system tell whether a forklift is two meters or twenty centimeters from a pedestrian, a distinction Bluetooth and Wi-Fi location systems can’t reliably make. Litum deploys UWB specifically where that gap matters: stopping a forklift before a collision, confirming a nurse actually reached a patient’s bedside, or verifying a worker made it to the muster point during an evacuation.
UWB’s jump from a niche radio technology to mainstream infrastructure has a clear inflection point: Apple’s 2019 U1 chip, the first UWB radio in a mainstream smartphone (the “U” stands for ultra-wideband), followed quickly by Samsung and Huawei. That consumer rollout mattered for enterprise deployments too, it drove the chipset volume and IEEE 802.15.4z standardization that made industrial-grade UWB hardware smaller and cheaper than it was a decade ago. That’s a large part of why UWB-based RTLS is now practical to deploy at the scale Litum’s customers need, hundreds or thousands of tags across a single facility, rather than the handful of specialized units UWB radar systems used through the 1990s and 2000s.
What is Ultra-Wideband (UWB)?
Unlike conventional radio technologies that transmit on a narrow frequency band, UWB spreads its signal across a bandwidth exceeding 500 MHz. This wide spectrum transmission is what gives UWB its precision advantage, allowing it to calculate time-of-flight measurements with nanosecond accuracy that narrowband technologies cannot achieve.
Most wireless technologies squeeze their signal into a narrow slice of spectrum and infer distance from how strong that signal is by the time it arrives, which is why a Bluetooth tag can tell you “somewhere in this room” but not “42 centimeters from that doorway.” UWB takes the opposite approach: instead of narrowing the signal, it spreads it across more than 500 MHz of bandwidth and measures how long a pulse actually takes to travel, down to the nanosecond. A Litum UWB tag fires roughly 500 million of these pulses per second, one every 2 nanoseconds, giving the system enough timing data to resolve a tag’s position to within 10 to 30 centimeters even in a crowded warehouse or a hospital corridor full of metal equipment that would otherwise scatter a weaker signal.
The FCC classifies radio technologies as UWB if they have a bandwidth exceeding 500 MHz, and strictly regulates transmission power to ensure coexistence with other wireless systems.
UWB operates across a frequency range of 6 to 8 GHz with a channel bandwidth exceeding 500 MHz. Standard enterprise RTLS deployments achieve positioning accuracy of 10 to 30 centimeters. A single infrastructure deployment can simultaneously locate thousands of tags, making UWB practical for large-scale industrial and healthcare environments.
UWB Safety
The power radiation levels of UWB are strictly regulated around the world and are required not to disturb existing equipment or cause harm to people. The spectrum of frequencies used in ultra-wideband technology and its applications are made to look like background noise.
Ultra-Wideband Vs. Wi-Fi and Bluetooth
The gap between UWB and the alternatives comes down to what each technology actually measures. Bluetooth and Wi-Fi read signal strength (RSSI) and estimate distance from how much that signal has faded, a method that gets thrown off by walls, shelving, or a forklift driving between the tag and the reader. UWB instead times the pulse itself, which is why its accuracy holds up in exactly the cluttered, metal-heavy environments where Litum’s customers operate: manufacturing floors, warehouses, hospital wings.
That timing precision has a second benefit beyond accuracy: security. Spoofing an RSSI-based system just means faking a stronger or weaker signal. Spoofing a UWB system means faking the actual travel time of a radio pulse to the nanosecond, which is why UWB is the technology Litum uses wherever a duress alarm or an access-controlled zone can’t afford a false or replayed signal.
The table below compares UWB against BLE and Wi-Fi across the key factors that matter for enterprise RTLS deployments.
| Feature | UWB | BLE | Wi-Fi |
|---|---|---|---|
| Accuracy | 10-30cm | 1-3m | 3-5m |
| Frequency band | 6-8 GHz | 2.4 GHz | 2.4/5 GHz |
| Security | Relay-attack resistant | Moderate | Moderate |
| Best for | Safety-critical zones | Zone tracking | Broad coverage |
| Litum use | Forklift safety, staff duress, infant security | Asset tracking, patient flow | Not primary |
For a full breakdown of how UWB, BLE, Wi-Fi, and RFID compare for enterprise deployments, see our guide on choosing the right RTLS technology.
How Ultra-Wideband is used for spatial awareness
That same pulse-timing precision is what makes UWB useful for more than just proximity alerts, it’s precise enough to guide someone through a building floor by floor, confirm an asset is in the correct storage bay rather than just “somewhere in the warehouse,” or verify a person actually reached a specific checkpoint rather than just the general area.
Daily use cases of Ultra-Wideband
Litum’s customers put UWB to work in two different ways: dense, moving, safety-critical facilities on the ground, and tag-free sensing applications that don’t require anyone to wear a badge at all (more on that below). On the facility side, OSHA data consistently ranks powered industrial trucks among the leading causes of serious workplace injuries, which is exactly the gap UWB-based proximity detection was built to close: real-time, centimeter-accurate awareness between machines and the people working around them.
Real-time positioning and tracking systems (RTLS) with Ultra-Wideband
RTLS is where that precision does the most work. Litum’s UWB-based RTLS turns individual pulse measurements into a live, facility-wide map, so a safety manager isn’t just told “a forklift is nearby,” they see exactly which forklift, exactly how close, and exactly how long it’s been in that zone.
For a complete overview of how UWB fits into a broader RTLS system, see our complete guide to real-time location systems.
Workplace safety
RTLS with UWB can be applied to improve people’s safety, health, and welfare of people in many occupations.
Collision Warning Systems
RTLS with UWB can be used in industrial settings to provide forklift or robotic collision warning systems with 360-degree awareness. RTLS with UWB can alert others in proximity to forklifts or autonomous robots, automatically control their functions and speed, monitor large working areas, and integrate data with other electronic systems in the working environment.
See how Litum deploys UWB for forklift collision warning in automotive and manufacturing facilities.
Employee Safety
Working remotely in the field comes with risks for all parties involved. If something goes wrong, there can be a long delay in figuring out how and why something went wrong. RTLS with UWB allows companies and their employees to have accident and risk monitoring systems (falls, collisions, prolonged inactivity, lone-worker safety, etc…), geo-fencing (for more security and control), automated safety alerts (too close to machinery or areas that may put the worker at risk), and panic buttons to immediately let others know they need help.
Connected Worker Safety
In 2026, UWB is central to connected worker programs in industrial environments. Workers wearing UWB-enabled badges can be monitored for proximity to dangerous machinery, lone worker situations, and emergency mustering. Unlike BLE-based systems, UWB delivers the sub-meter accuracy needed to reliably trigger alerts before incidents occur rather than after. See how Litum uses UWB for lone worker safety and emergency mustering.
Operational Efficiency
The operational efficiency of workers and machines can be improved using RTLS with UWB because of the highly accurate location data and the large amount of data transfer the technology makes possible. Each company will have to implement RTLS with UWB in unique ways to reap the benefits of what is possible. Some common applications of RTLS with UWB for improving operational efficiency include:
UWB’s precision also shows up outside industrial and healthcare settings, phone-as-a-car-key systems and smart home devices both use the same time-of-flight measurement Litum applies to forklift safety and staff duress, just at consumer scale rather than facility scale.
Medical Imaging and Monitoring With Ultra-Wideband
The low power consumption of UWB and its high precision makes it ideal for use in environments sensitive to radio frequencies, such as medical environments. It can also quickly identify the position of other objects nearby based on the relative position of the UWB device and the object.
UWB offers unique medical imaging and monitoring systems capabilities because it has powerful obstacle penetration, high precision at the centimeter level, low electromagnetic radiation, and low consumption of processing energy.
The benefits of using UWB in medical imaging and monitoring, as documented by researchers and the National Institutes of Health, include:
- UWB imaging and monitoring systems can be designed with extremely low energy consumption requirements, enabling long-life battery-operated medical devices.
- Low radiation produced in UWB is safe for the human body, even at close distances.
- The low noise of UWB allows it to be used with other systems without disrupting their performance, such as wireless sensor networks (WSN), which require strict power control and efficiency.
- UWB pulses possess strong temporal and space resolving capabilities making them suitable for localization and detection in medical applications requiring centimeter-level precision.
- UWB can penetrate through obstacles making it an ideal tool for imaging the human body in medical settings. For example, ultrasound is limited because bones obstruct its view, while UWB imaging is not blocked by bone.
Data transmission
The extensive throughput capabilities facilitated by UWB render it particularly suitable for various electronic devices such as computers, monitors, cameras, printers, smartphones, and more. This technology enables rapid and secure transfer of large volumes of data between interconnected devices.
UWB Radar: An Emerging Application
UWB’s radar capabilities trace back to 1990s military applications like synthetic aperture radar for detecting concealed objects at a safe distance, but the more relevant shift for Litum’s customers today is tag-free sensing: a single UWB radar device reads reflected pulses to detect movement or presence without requiring anyone to wear a badge or carry a tag.
That distinction matters most in the parts of a facility where tagging every person isn’t practical, a loading dock entrance, a restricted machine zone, a hospital room. Instead of tracking a known tag, the system senses whether anyone or anything has entered the space at all, which makes it a natural complement to Litum’s tag-based RTLS rather than a replacement for it: tags for identifying and tracking specific people and assets across a facility, radar sensing for the handful of zones where the only question is whether anyone is there right now.
Ultra-Wideband is here to stay. What does the future of UWB look like?
The adoption of UWB is accelerating rapidly. For a deeper look at how UWB tracking is evolving across industries, see our analysis of UWB tracking trends and predictions.
Regulation
The regulatory authorities around the world are developing and implementing reasonable regulations surrounding ultra-wideband technology and its applications. The Federal Communications Commission (FCC) of the United States classifies radio technologies as UWB if they have a bandwidth exceeding the lesser 500MHz or 20% of the arithmetic center frequency (the center channel between the upper and lower parts of the radio frequency).
The FCC set different limits for UWB transmitters and emitters. Transmitters have a power spectral density emission limit of -41.3 dBm/MHz, and emitters have a limit of -75 dBm/MHz. These limits are in place for UWB to reduce the technology’s potential to cause harm to people or infrastructure.
The FiRa Consortium, composed of over 120 members including major chipset and handset manufacturers, governs UWB interoperability standards globally. Devices must meet FiRa MAC/PHY conformance specifications to display the FiRa certification logo.
Frequently Asked Questions About UWB
What does UWB stand for?
UWB stands for Ultra-Wideband, a radio technology that locates a device by timing pulses rather than reading signal strength. Litum uses UWB specifically for the applications on this page where centimeter-level accuracy is the difference between a system that’s useful and one that’s just a nice-to-have: forklift collision warning, staff duress, infant security.
How accurate is UWB positioning?
Litum’s UWB deployments hold 10 to 30 centimeter accuracy in real industrial and healthcare environments, not lab conditions. BLE-based systems typically manage 1 to 3 meters and Wi-Fi based systems 3 to 5 meters, which is fine for “which zone is this asset in” but not for “is this forklift about to hit someone.”
What is the difference between UWB and Bluetooth?
Bluetooth infers distance from signal strength, which drifts when anything (a person, a pallet, a wall) gets between the tag and the reader. UWB times the radio pulse directly, so it holds its accuracy in exactly the environments where BLE tends to degrade, which is why Litum pairs UWB with BLE rather than replacing one with the other: UWB for the safety-critical zones, BLE for broader, lower-cost coverage.
What industries use UWB technology?
On the Litum platform specifically: manufacturing and warehousing for forklift and worker safety, healthcare for infant security and staff duress, logistics for yard and asset tracking, and construction and oil & gas for lone-worker monitoring. Home Depot Mexico’s forklift pedestrian safety deployment is one live example of this in an industrial setting.
What is UWB RTLS?
UWB RTLS is what you get when you combine UWB’s pulse-timing accuracy with the tags, anchors, and software that turn raw distance measurements into a live map of where every person and asset actually is. Litum’s RTLS platform runs this as a hybrid system, UWB for the zones that need centimeter precision, BLE where zone-level accuracy is enough, on the same software backbone.
Is UWB safe for humans?
Yes. UWB’s pulses are so low-power and short-duration that regulators (the FCC in the US) require them to look like background radio noise rather than a distinct signal, which is why UWB tags are cleared for use on infants and patients in hospital settings, one of Litum’s own deployment categories.
What is the range of UWB?
In open air, UWB can reach up to 500 meters, but Litum’s indoor RTLS deployments are engineered around 10 to 50 meters per anchor with overlapping coverage, since the goal indoors isn’t maximum range, it’s unbroken, accurate tracking as a person or asset moves from one anchor’s coverage into the next.
Conclusion
Ultra-wideband has moved from a niche military and research technology to essential enterprise infrastructure. In 2026, UWB is the standard for precision-dependent RTLS applications where centimeter-level accuracy directly affects safety outcomes.
For organizations evaluating UWB for industrial safety, healthcare asset management, or connected worker programs, the technology is mature, proven, and deployable at scale. Litum builds hybrid RTLS solutions combining UWB and BLE to give organizations the precision they need where it matters most.
For technical specifications on Litum’s compact UWB hardware, see the UWB RTLS tag guide.
Explore Litum’s UWB-based solutions for forklift safety, staff protection, and asset tracking, or contact us for a deployment assessment.
