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Ultra high frequency (UHF) designates a range (band) of electromagnetic
waves whose frequency is between 300 MHz and 3 GHz (3,000 MHz). Also known
as the decimeter band or decimeter wave as the wavelengths range from ten
to one decimeters. Radio waves whose frequency is above the UHF band fall
into the SHF (Super high frequency) and EHF (Extremely high frequency)
bands; all of which fall into the Microwave frequency range. Lower
frequency signals fall into the VHF or lower bands. See electromagnetic
spectrum for a full listing of frequency bands.
Uses UHF and VHF are the most commonly used frequency bands for
transmission of television signals. Modern mobile phones also transmit and
receive within the UHF spectrum. UHF is widely used by public service
agencies for two-way radio communication, usually using narrowband
frequency modulation, but digital services are on the rise. There has
traditionally
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