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Very high frequency (VHF) is the radio
frequency range from 30 MHz to 300 MHz. Frequencies immediately below VHF
are denoted High frequency (HF), and the next higher frequencies are known
as Ultra high frequency (UHF).
Common uses for VHF are FM radio broadcast, television broadcast, land mobile
stations (emergency, business, and military), Amateur Radio,
marine communications, air traffic control communications and air navigation
systems (VOR in particular).
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 radio and thus transmissions
are restricted to the local area (and don't interfere with transmissions
thousands of kilometres away). VHF is also less affected by atmospheric
noise and interference from electrical equipment than lower frequencies.
Whilst it is more easily blocked by land features than HF and lower
frequencies, it is less bothered by buildings and other less substantial
objects than UHF frequencies.
VHF Mobile Radios are designed to be installed in fixed locations.
* More
Data and Information on VHF Mobile Radio for Two Way Radio
See All Mobile
Radios at PSICOMPANY.COM:
Low Band Mobiles,
VHF Mobiles,
UHF Mobiles,
800 MHz Mobiles,
900 MHz Mobiles,
SSB-HF Mobiles
Mobile Radio Accessories
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