Very High Frequency - Propagation Characteristics

Propagation Characteristics

VHF propagation characteristics are ideal for short-distance terrestrial communication, with a range generally somewhat farther than line-of-sight from the transmitter (see formula below). Unlike high frequencies (HF), the ionosphere does not usually reflect VHF waves (called skywave propagation) so transmissions are restricted to the local radio horizon less than 100 miles. VHF is also less affected by atmospheric noise and interference from electrical equipment than lower frequencies. Whilst it is blocked by land features such as hills and mountains, it is less affected by buildings and other less substantial objects than UHF frequencies.