side band

or side·band


noun Radio.

the band of frequencies at the sides of the carrier frequency of a modulated signal.

Origin of side band

First recorded in 1795–1805

British Dictionary definitions for sideband

sideband
/ (ˈsaɪdˌbænd) /

noun

the frequency band either above (upper sideband) or below (lower sideband) the carrier frequency, within which fall the spectral components produced by modulation of a carrier wave See also single sideband transmission