short wave
US /ˈʃɔːrtˌweɪv/
UK /ˈʃɔːrtˌweɪv/

1.
onde corte
radio waves of a wavelength between about 10 and 100 meters (a frequency of 3 to 30 MHz), used for long-distance transmission.
:
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He listened to international news on his shortwave radio.
Ascoltava le notizie internazionali sulla sua radio a onde corte.
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Shortwave communication is often used in remote areas.
La comunicazione a onde corte è spesso utilizzata in aree remote.