balun
|ba-lun|
/bəˈluːn, ˈbælən/
balanced ↔ unbalanced converter
Etymology
'balun' originates from English, specifically a clipped compound of 'balanced' and 'unbalanced' (often from the phrase 'balanced-to-unbalanced'), where 'balanced' meant 'having equal and opposite conductors or signals' and 'unbalanced' meant 'having a single conductor referenced to ground.'
'balun' was coined in mid-20th-century radio and electronics usage as a shortened form of 'balanced-to-unbalanced' (or 'balanced/unbalanced') device; it became established in technical literature to refer to transformers or networks performing that function.
Initially, it referred specifically to simple transformers used to connect balanced antennas to unbalanced feedlines; over time it broadened to include a variety of devices (transformers, choke baluns, transmission-line baluns, networks) that convert or isolate balanced and unbalanced systems and sometimes provide impedance matching.
Meanings by Part of Speech
Noun 1
an electrical device that converts between a balanced (two-conductor with equal and opposite signals) and an unbalanced (single-conductor with reference to ground) transmission line or signal, commonly used in radio and antenna systems.
I connected the antenna to the coax using a balun to prevent feedline currents from distorting the pattern.
Synonyms
Noun 2
a device that both converts balanced and unbalanced connections and provides impedance matching between an antenna and a feedline (often used in HF/VHF/UHF systems); may be implemented as a transformer, choke, or network.
We used a 1:1 balun at the feed point to help match the antenna and reduce reflected power.
Synonyms
Last updated: 2026/01/08 14:50