Ultra High Frequency

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What Does Ultra High Frequency Mean?

Ultra high frequency (UHF) refers to the band of electromagnetic radiation with a radio frequency range between 300 MHz and 3 GHz (3000 MHz). This band is also known as the decimeter band, with a wavelength ranging from 1 m to 1 dm. The UHF radiations are least affected by environmental factors, that is why they are most commonly used for TV and radio transmission and channel broadcasting. They have strong directivity, but, at the same time, the receiving error increases.

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Techopedia Explains Ultra High Frequency

Ultra high frequency is widely used for data transmission owing to its short wavelength and high frequency. Since the size of a reception antenna is directly proportional to the size of the waves, the antennas for UHF are short and stout. The higher the frequency band is, the less conspicuous the antenna size would be. The broadcast range (also called line of sight) of UHF is shorter than that of VHF, that is why boosters are used after a few hundred kilometers. UHF is used by cordless and two-way navigation, wireless local area networks, and communication, radio and security systems. UHF radars are said to be effective at tracking stealth fighters but not stealth bombers.

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Margaret Rouse
Senior Editor
Margaret Rouse
Senior Editor

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.