MF stands for medium frequency. It designates the portion of the radio spectrum between 300 kHz and 3 MHz. This band includes standard AM broadcasting, navigational beacons, and maritime communication channels. Signals in this range propagate primarily via ground waves during the day and skywaves at night, giving them regional reach.
Heard on the job
We need to check the MF antenna tuning before the maritime broadcast goes out.
Related terms
HF
High frequency designates the portion of the radio spectrum between 3 and 30 megahertz.
VHF
Very high frequency refers to radio waves in the range of 30 to 300 megahertz.
UHF
The radio frequency band spanning from 300 megahertz to 3 gigahertz.
Frequency band
A defined contiguous range of radio frequencies allocated for a specific purpose.