The electromagnetic spectrum, the range of all possible frequencies of electromagnetic radiation, includes the K band of the microwave bands or radio waves with wavelengths that could be as long as one meter (m) or as short as one millimeter (mm) which is equivalent with frequencies between 300 MHz (.3 GHz) and 300 GHz. And one of them is Ka band, the one which covers 26.5 GHz to 40 GHz.
Made by Adriano Cachele, Mauricio Delgado Hershlag and Stephen Lutz, Ka Band comes from the German word “Kurz” and its position–directly “above” K band–making “Kurz-above,” or simply Ka band.
The 30.20 GHz band is used in the following: communications satellites (COMSAT), an artificial satellite positioned in space for the telecommunication purposes; uplink, sometimes abbreviated as UL or U/L, is a part of a communications link for the transfer of signals from an Earth terminal to a satellite or to an airborne platform), either the 27.5 GHz and 31 GHz bands; and high-resolution, close-range targeting military airplane radars, a system to detect objects through radio waves to know the range, altitude, direction, or speed of objects. Some frequencies in this band also used it for vehicle speed detection by law enforcement. NASA’s Kepler Mission, through an American space observatory (Kepler satellite), uses Ka band to downlink the scientific data collected by space telescope as they unravel Earth-like planets orbiting the stars.
This frequency range allows higher bandwidth communication in satellite communications. It is therefore a good use, for example, for the upcoming Iridium Next satellite series, although it is far more susceptible to rain fade, or signal attenuation under rainy conditions, unlike Ku and C bands.
As defined by the Radio Society of Great Britain (RSGB) which was first founded in 1913 as the London Wireless Club, United Kingdom’s recognized national society for amateur radio operators, the other microwave frequency bands aside from Ka band are the following: L band (1 to 2 GHz), S band (2 to 4 GHz), C band (4 to 8 GHz), X band (8 to 12 GHz), Ku band (12 to 18 GHz), K band (18 to 26.5 GHz), Q band (30 to 50 GHz), U band (40 to 60 GHz), V band (50 to 75 GHz), E band (60 to 90 GHz), W band (75 to 110 GHz), F band (90 to 140 GHz), and D band (110 to 170 GHz).
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