'antenna-related' is a compound formed from 'antenna' and 'related'. 'antenna' originates from Latin, specifically the word 'antenna', where it originally meant 'a yard (of a sail)'. 'related' originates from Latin, specifically the past participle 'relatus' (from 'referre'), where 're-' meant 'back' and 'ferre' meant 'to carry'.

'antenna' passed into Italian and French as 'antenna' and was adopted into English; in the 19th century it gained the technical sense 'radio aerial'. 'relatus' became Old French 'relater', then Middle English 'relaten', leading to Modern English 'relate' and its adjective 'related'. The modern compound 'antenna-related' formed in contemporary English to describe things connected to antennas.

Initially, 'antenna' meant 'a yard of a sail' and later came to mean a projecting appendage and then, in technical contexts, a radio aerial; 'related' originally (via Latin) carried the sense of 'brought back' and developed to mean 'connected to' or 'concerning'. Together the compound now simply means 'connected to or concerning antennas'.