Microwave transmission
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![A parabolic satellite antenna for Erdfunkstelle Raisting, based in Raisting, Bavaria, Germany.](/Images/godic/202501/27/Erdfunkstelle_Raisting_21331.jpg")
![C band horn-reflector antennas on the roof of a telephone switching center in Seattle, Washington, part of the U.S. AT&T Long Lines microwave relay network.](/Images/godic/202501/27/Hogg_horn_antennas1331.jpg")
![Dozens of microwave dishes on the Heinrich-Hertz-Turm in Germany.](/Images/godic/202501/27/Airkz_20040717_heinrich_hertz_turm1331.jpg")
Microwave transmission is the transmission of information or energy by electromagnetic waves whose wavelengths are measured in small numbers of centimetre; these are called microwaves. This part of the radio spectrum ranges across frequencies of roughly 1.0 gigahertz (GHz) to 300 GHz. These correspond to wavelengths from 30 centimeters down to 0.1 cm.