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UWB(Ultra-WideBand) A wireless technology that uses less power and provides higher speed than Wi-Fi and first-generation Bluetooth products. Governed by the WiMedia Alliance, UWB is geared for home theater video, auto safety and navigation, medical imaging and security surveillance.
In 2019, Apple's iPhone 11 debuted with UWB to improve its AirDrop wireless sharing feature. UWB provides more precise detection of another iPhone in the vicinity than does Bluetooth. See AirDrop.
Unlike other radio transmission, UWB does not use a continuous carrier frequency. It transmits extremely short pulses, and the durations between pulses use no power. One method transmits the pulses in continuously varying time slots based on a pseudo-random number sequence like CDMA. The other divides the spectrum into smaller frequency bands that can be added and dropped as necessary.
UWB Sees Through Walls
Because UWB can transmit through materials that would bounce other radio signals, it is also used to pinpoint objects behind barriers or buried underground. First invented by Gerald Ross at Sperry Rand Corporation in the late 1960s, UWB has been used by the military for various radar systems. In 1998, the FCC allowed UWB for police work and fire fighting. In 2002, it sanctioned the technology at considerably lower power for commercial use. See WiMedia Alliance, 802.15 and GPR.
Max. Freq. IndoorWireless Speed Range RangeType (Mbps) (GHz) (ft.)UWB 480 3.1-10.6 33 Bluetooth BT 1.2 1 2.4 330 BT 2.0 3 2.4 330 Wi-Fi 802.11b 11 2.4 150 802.11g 54 2.4 170 802.11a 54 5 95 802.11n 600 2.4/5 230 802.11ac 6770 5 230
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