出典:Wiktionary
radio frequency (countable かつ uncountable, 複数形 radio frequencies)
出典:『Wiktionary』 (2015/01/11 10:24 UTC 版)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/01 14:02 UTC 版)
Radio frequency (RF) is a rate of oscillation in the range of about 3 kHz to 300 GHz, which corresponds to the frequency of radio waves, and the alternating currents which carry radio signals. RF usually refers to electrical rather than mechanical oscillations, although mechanical RF systems do exist (see mechanical filter and RF MEMS).
of radio and TV, a particular band of radio waves
放射線.
a succession of frequency ranges each beginning where the previous leaves off called a frequency band