Extremely High Frequency (EHF)

The EHF band is an RF frequency in the band 3-30 GHz, commonly used in satellite communications. The SHF and EHF bands are known as the microwave bands and their wavelengths are short enough to be propagated by highly directional antennas and waveguides. Propagation ranges are limited to line-of-sight but long-distance communication can be achieved by employing a series of radio-relay stations. These portions of the spectrum are used for television and high-speed data services requiring large bandwidths. The SHF band is also used for satellite communications.