HIGHFREQUENCY
High frequency
High frequency is the ITU-designated range of radio frequency electromagnetic waves between 3 and 30 MHz. Also known as the decameter band or decameter wave as the wavelengths range from one to ten decameters . Frequencies immediately below HF are denoted medium frequency, and the next higher frequencies are known as very high frequency . The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio. Because radio waves in this band can be reflected back to Earth by the ionosphere layer in the atmosphere, called "skip" or skywave propagation, these ...The above text is a snippet from Wikipedia: High frequency
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high frequency
Noun
- The frequency area from 3 MHz through 30 MHz, commonly used for radio broadcasting.
The above text is a snippet from Wiktionary: high frequency
and as such is available under the Creative Commons Attribution/Share-Alike License.