What frequency range does EHF operate in?

EHF, or Extremely High Frequency, operates in the frequency range of 30 to 300 Gigahertz. This range is significant because it falls within the spectrum used for various sophisticated telecommunications, radar, and satellite operations. The EHF band is known for its unique propagation characteristics, allowing for high bandwidth transmissions with limited interference, as well as its utility in penetrating atmospheric conditions, making it beneficial for military applications, satellite communication, and secure data transmission.

The other frequency ranges mentioned in the choices do not fall within the definition of EHF as recognized by telecommunications standards. For example, the ranges of 10-100 Megahertz, 1-10 Gigahertz, and 300-3000 Megahertz correspond to lower frequency bands, such as VHF, UHF, and part of the SHF band, which serve different purposes and have distinct characteristics compared to EHF. Understanding the correct frequency range helps in recognizing the capabilities and applications of technologies that utilize EHF.