noun
radio wave; radio beam
Refers to electromagnetic waves used for radio communication, including broadcasting and directional beams.
ラジオ電波が届かない山奥では、携帯電話も使えない。
In the deep mountains where radio waves don't reach, you can't use a cell phone either.
このアンテナは微弱なラジオ電波も受信できる。
This antenna can receive even weak radio waves.