Ultra high frequency: Difference between revisions

'''Ultra high frequency''' ('''UHF''') is the [[ITU]] designation for [[radio frequency|radio frequencies]] in the range between 300 [[megahertz]] (MHz) and 3 [[gigahertz]] (GHz), also known as the '''decimetre band''' as the wavelengths range from one meter to one tenth of a meter (one [[decimeter]]). Radio waves with frequencies above the UHF band fall into the [[super-high frequency]] (SHF) or [[microwave]] frequency range. Lower frequency signals fall into the VHF ([[very high frequency]]) or lower bands. UHF radio waves propagate mainly by [[Line-of-sight propagation|line of sight]]; they are blocked by hills and large buildings although the transmission through building walls is strong enough for indoor reception. They are used for [[UHF television broadcasting|television broadcasting]], [[cell phones]], satellite communication including [[GPS]], [[personal radio service]]s including [[Wi-Fi]] and [[Bluetooth]], [[walkie-talkie]]s, [[cordless phone]]s,, [[satellite phone]]s, and numerous other applications.