What Is VHF?
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF).
VHF radio waves propagate mainly by line-of-sight, so they are blocked by hills and mountains, although due to refraction they can travel somewhat beyond the visual horizon out to about 160 km (100 miles). Common uses for radio waves in the VHF band are Digital Audio Broadcasting (DAB) and FM radio broadcasting, television broadcasting, two-way land mobile radio systems (emergency, business, private use and military), long range data communication up to several tens of kilometers with radio modems, amateur radio, and marine communications. Air traffic control communications and air navigation systems (e.g. VOR and ILS) work at distances of 100 kilometres (62 mi) or more to aircraft at cruising altitude.
Types Of VHF?
According to US frequency groups there are four different categories: low-band VHF (49-108 MHz), high-band VHF (169-216 MHz), low-band UHF (450-806 MHz), and high-band UHF (900-952 MHz). The FCC is in control of who operates within each specific band and if anyone has priority over other operators.
What Is UHF Used For?
Besides their use in television broadcasting, UHF waves are utilized in ship and aircraft navigation systems and for certain types of police communications. In some instances, radio communications between spacecraft and Earth-based tracking stations are carried via UHF signals. See also VHF.
How Far Can VHF Waves Travel?
VHF radio waves propagate mainly by line-of-sight, so they are blocked by hills and mountains, although due to refraction they can travel somewhat beyond the visual horizon out to about 160 km (100 miles).
VHF Prices In Ghana:
ICOM VHF, Basic, Compact, Black, Standard, M330
GHS 3,310.00
6 Pack of Icom IC-F3001 VHF PREPROGRAMMED Radios
GHS 2,334.100
ICOM VHF, Basic, Compact, White, Standard
VHF, Basic, Compact, w/GPS, Black
GHS 4,238.00
Icom IC-2730A Dual Band VHF/UHF 50W Mobile Radio
GHS 7295.00
Uniden UM385 Fixed Mount VHF Marine Radio w/ IPX4/JIS4 Waterproof Level
GHS 2,298.00
Uniden UM725GBT Black VHF Uniden UM725GBT
GHS 5,973.00