Assertion: radio wave's frequency | /r/HasProperty | hf
Facets:
Source sentences:
text: High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz).
text: Shortwave (also known as High frequency (HF)) transmissions range from approximately 2.3 to 26.1 MHz, divided into 14 broadcast bands.
text: These systems were based on high frequency (HF) at 13.56 megahertz.
text: Frequencies that are affected by ionospheric propagation range from approximately 500 kHz to 50 MHz but the majority of such NLOS links operate in the 'short wave' or high frequency (HF) frequency bands between 3 MHz and 30 MHz.
text: To prevent interference with these services, amateur and experimental transmitters were restricted to the high frequencies (HF), felt to be useless since their ground-wave range was limited.
text: Frequencies immediately below MF are denoted low frequency (LF), while the first band of higher frequencies is known as high frequency (HF).