High frequency (HF) is an electromagnetic frequency defined by the International Telecommunications Union (ITU) for radar and radio communications . It operates in a range of three to thirty MHz and as the wavelengths spread over ten to one hundred meters, it is also known as decameter wave and designated as band 7.
Read moreWhy do we use high frequency carrier for modulation?
For the transmission of audio signals at distant places, the high frequency carrier waves are used, because these frequency carrier waves travel through space or medium with the speed of light and they are not obstructed by earth’s atmosphere .
Read moreWhy do we use high or low frequency scheme?
This type of radiation can also travel further distances around the Earth than other types of radiation, for reasons we will discuss later. Therefore HF and lower frequency radiation is the best to use for direct long distance communications (when satellites or long cables cannot be used).22 Eki 2003
Read moreWhy do we use high frequency in communication?
Higher frequencies provide more bandwidth ; you could send far more data in less time with a VHF antenna than a lower frequency antenna. … And as you increase the frequency, you increase the transmission quality as long as you’re dealing with high-definition signals.28 Oca 2021
Read moreWhat is the main advantage of high frequencies?
The main advantage of high frequency signals is that the signal may be transmitted over very long distances and thus dissipates very less power . The antenna height required for transmission is reduced at higher frequencies.
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