radiofrequency 

Initialism: RF
https://doi.org/10.1351/goldbook.08279
Frequency or band of frequencies in the range 104 to 1012 Hz.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 670 [Terms] [Paper]