noun
ultrashort wave; very high frequency
Technical term in radio engineering; refers to electromagnetic waves with wavelengths between 1 and 10 meters (30–300 MHz).
超短波はテレビ放送やFMラジオに使われている。
Ultrashort waves are used for television broadcasting and FM radio.
極超短波 (microwave) has even shorter wavelengths (1 mm–1 m) than 超短波.
Compound of 超 (ultra-) + 短波 (shortwave), literally 'ultra-shortwave'. A calque from English or German technical terminology.