VHFområdet

VHFområdet refers to the Very High Frequency radio spectrum, typically spanning frequencies from 30 megahertz (MHz) to 300 MHz. This band is a crucial part of the radio frequency spectrum and is utilized for a wide array of applications due to its propagation characteristics. VHF waves travel in relatively straight lines and can be affected by atmospheric conditions, but they are less susceptible to ground wave attenuation than lower frequencies.

Within the VHFområdet, numerous services operate. Common applications include terrestrial television broadcasting, FM radio, and two-way radio communication systems such as those used by emergency services, taxis, and amateur radio operators. Aviation and maritime communication also heavily rely on VHF frequencies for air traffic control and ship-to-ship or ship-to-shore communication, respectively. The relatively short wavelengths in this range allow for the use of compact antennas.

The allocation and regulation of frequencies within the VHFområdet are managed by national and international bodies, such as the International Telecommunication Union (ITU), to prevent interference between different services. Different countries may have specific sub-allocations for various uses. The line-of-sight propagation of VHF signals makes it suitable for local and regional communication but limits its long-distance reach without the aid of repeaters or satellites.