UWB

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UWB

(1) (Ultra WideBand) A branding for high-frequency 5G cellular service. See 5G UWB.

(2) (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.

Pulse Radio
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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References in periodicals archive ?
Choi, "Design of an ultrawideband TEM horn antenna with a microstrip-type balun," IEEE Transactions on Antennas and Propagation, Vol.
Armaki, "Ultrawideband planar LPDA antenna with mode converter balun," Electronics Letters, vol.
Kenan, "Partially dielectric-loaded ridged horn antenna design for ultrawideband gain and radiation performance enhancement," IEEE Antennas and Wireless Propagation Letters, Vol.
Chen, "Ultrawideband circularly polarized spiral antenna using integrated balun with application to time-domain target detection," IEEE Transactions on Antennas and Propagation, Vol.
This is why an ultrawideband microstrip antenna is presented.
Band notch UWB antennas Dimensions Notched band Ultrawideband rectangular 35 mm x 35 mm 5-6 GHz aperture antenna [34] Ultrawideband antennas using 30mm x 39.3 mm 5.15-5.825 GHz simple ground stubs [35] Monopole antenna with band- 30 mm x 35 mm 5.12-6.08 GHz notched characteristics [36] Compact printed antenna using 30 mm x 36 mm 4.85-6.04 GHz inverted L-slit [37] Monopole antenna with open- 35 mm x 30 mm Centered at 5 GHz looped resonator [38] Ultra wideband antenna on 3D profile 5.1-6.2 GHz double substrates crossing [39] Proposed 26 mm x 24 mm 5.1-5.95 GHz
Vendors generally recognize that bar code data collection and some human triggered scanning of passive RFID tags remain vital to supply chains, even while technologies like ultrawideband (UWB) and Bluetooth Low Energy (BLE) beacons can enable new types of real-time locating system (RTLS) solutions.
Ur Rehman, "A novel dual ultrawideband CPW-fed printed antenna for Internet of Things (IoT) applications," Wireless Communications and Mobile Computing, Vol.
Serpedin, "Ultrawideband band-notched flexible antenna for wearable applications," IEEE Antennas and Wireless Propagation Letters, vol.
Popovic et al., "A large-scale study of the ultrawideband microwave dielectric properties of normal breast tissue obtained from reduction surgeries," Physics in Medicine and Biology, vol.
Belichenko's Ultrawideband short-Pulse Radio Systems (97816307811051, $179.00) is an in-depth survey of the methods, analysis and practice of UWB systems and explores theories, systems, and applications alike.