Most familiar wireless standards such as Bluetooth, Wi-Fi, Zigbee, cellular are narrowband technologies. They transmit data by modulating a carrier frequency: a continuous reference signal that both sides of the link must establish and maintain before data can flow.

This has consequences: initialization delay, constrained modulation rate, and continuous phase tracking that makes the receiver sensitive to interference, reflection, and movement.

LE-UWB uses a fundamentally different approach: impulse radio. Instead of a carrier, LE-UWB transmits data as discrete ultra-short pulses, each 5 nanoseconds or less. There is no carrier to lock on to, no initialization delay, and no phase tracking requirement. A link can start transmitting immediately.

This is not a new idea. The earliest radio transmissions used spark-gap impulse transmitters. LE-UWB applies the same physical principle with precision engineering and proprietary power optimization built on top.

Unlike narrowband radios that squeeze a signal into a thin slice of spectrum, LE-UWB spreads its energy across a wide portion of it. The SR1120 operates in the 6.2–9.5 GHz band, divided into several wide channels the radio can be tuned across. That wide occupied bandwidth is what gives ultra-wideband its defining properties: fine timing resolution, strong resistance to multipath, and room for high data rates.

The spectrum is dynamically reconfigurable, so the SR1120 can select channels to suit regional UWB regulations rather than being locked to a single fixed allocation. Combined with antenna diversity and configurable symbol rates up to 40.96 MHz, this lets one device operate across regions and coexist with BLE, Wi-Fi, and cellular instead of contending for the crowded 2.4 and 5 GHz bands.