Ultra high frequency
Ultra High frequency, often abbreviated to UHF, refers to a region of the electromagnetic radiation spectrum consisting of a frequency between 300 and 3000 MHz. It is used to carry television signals for channels 14 to 83 as well as some types of aircraft and navigation system. As the wavelength for waves in the UHF band is so small, they can be used to create directional beams. Unlike VHF, they reflect only slightly off the ionosphere. UHF has a shorter range than lower frequency options not only because it does not reflect well, but also because the signal itself degrades more quickly.