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The largest use of this band is by Wi-Fi networks; the IEEE 802.11b and 802.11g standards use the 2.4 GHz section of the S band. These are the most widely used computer networks in the world, used globally in home and small office networks to link desktop and laptop computers, tablet computers, smartphones, smart TVs, printers, and smart speakers together and to a wireless router to connect ...
The K a band is more susceptible to rain attenuation than is the K u band, which in turn is more susceptible than the C band. [23] [24] The frequency is commonly used by cosmic microwave background experiments. 5th generation mobile networks will also partially overlap with the K a band (28, 38, and 60 GHz). [citation needed]
The idea to give each band a number, in which the number is the logarithm of the approximate geometric mean of the upper and lower band limits in Hz, originated with B. C. Fleming-Williams, who suggested it in a letter to the editor of Wireless Engineer in 1942. For example, the approximate geometric mean of band 7 is 10 MHz, or 10 7 Hz. [14]
The IEEE K-band is a portion of the radio spectrum in the microwave range of frequencies from 18 to 27 gigahertz (GHz). The range of frequencies in the center of the K-band between 18 and 26.5 GHz are absorbed by water vapor in the atmosphere due to its resonance peak at 22.24 GHz, 1.35 cm (0.53 in).
WGS-10 is the latest part of a constellation of highly-capable communications satellites that serve the armed forces of the United States and its allies. It carries Ka-band and X-band transponders with 8.088 gigahertz of bandwidth. In 2019, Boeing received a contract to build an 11th WGS satellite.
The K u band (/ ˌ k eɪ ˈ j uː /) is the portion of the electromagnetic spectrum in the microwave range of frequencies from 12 to 18 gigahertz (GHz). The symbol is short for "K-under" (originally German: Kurz-unten), because it is the lower part of the original NATO K band, which was split into three bands (K u, K, and K a) because of the presence of the atmospheric water vapor resonance ...
Band designation Deep space bands (for space stations more than 2,000,000 km from Earth) Near space bands (for space stations less than 2,000,000 km from Earth) Up-link (Earth to space) Down-link (Space to Earth) Up-link (Earth to space) Down-link (Space to Earth) S band: 2110–2120: 2290–2300: 2025–2110: 2200–2290 X band: 7 145–7 190: ...
Most commercial voice and some data mobile satellite services are provided by systems operating in the L-band by Iridium, Inmarsat, Globalstar and Thuraya.The L-band spectrum allocated for MSS is between 1.5 and 2.5 GHz, with the upper portion often referred to as the S-band.