What does narrowband mean?
Narrowband is a technical term for communication that uses a restricted range of radio frequencies or comparatively low data-transfer capacity. It appears in discussions of wireless networks, radio systems, connected sensors, and other technologies where power efficiency, long range, or resistance to interference may matter more than high speed or abundant bandwidth. A narrowband radio network, for example, can support devices that transmit small amounts of data over long distances while using little battery power. The word is also used as a noun for narrowband technology itself, especially in telecommunications. Although its meaning resembles that of low-bandwidth, narrowband more specifically evokes a restricted frequency range or a narrow communications channel. It is the opposite of broadband in the principal technical contrast, though the terms are not always exact formal opposites in every context.
Using or operating with a restricted range of frequencies or a limited data-transfer capacity.
"The technician tested the narrowband receiver in a remote mountain valley."
Common in radio, wireless communications, signal processing, and related technical fields.
A communications technology or network that uses a restricted frequency range or comparatively low data capacity.
"The utility chose narrowband for its remote meter-reading system."
More common in technical and industry contexts than in general conversation.
Narrowband technology trades speed and capacity for reach and efficiency, the same principle that lets low-power radio networks connect devices across vast distances.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of narrowband
The word combines narrow with band, both of which are English words in ordinary use. Band refers to a range of radio frequencies, and narrow modifies that range to indicate a limited frequency allocation. The compound became established in telecommunications terminology during the 20th century. It belongs to a family of expressions built around bandwidth, including broadband and wideband, which describe communication using a broader range of frequencies or greater data capacity.
Related word forms
How narrowband is actually used
The term is primarily technical and is common in telecommunications, radio, wireless networking, and signal processing. It is distinct from ordinary uses of narrow and band as separate words, and is often written with a hyphen, as in narrow-band radio, especially in older technical usage.
Easily confused with narrowband
Narrowband uses a limited frequency range or lower data capacity, whereas broadband supports a much broader range of frequencies and higher data-transfer rates.