Antena 3 is one of the three national radio channels produced by the Portuguese public broadcasting entity Rádio e Televisão de Portugal (RTP). Launched on April 26, 1994, the station specializes in contemporary and alternative music, focusing on showcasing new artists. Antena 3 is known for its promotion of Portuguese music and has played a significant role in discovering and promoting important contemporary Portuguese bands.

The station features live concerts, news, and chart countdown programmes. In 2015, Antena 3 was rebranded as "the entrance door of pop culture in the RTP universe." Over the years, it has been controlled by various directors, with Nuno Reis currently at the helm.

Antena 3's programming includes a diverse range of shows hosted by well-known Portuguese radio personalities, covering genres from metal and reggae to hip-hop and electronic music. The station also features programs dedicated to cinema, Portuguese music, and cultural content.

With its focus on youth-oriented content and alternative music, Antena 3 continues to be an important platform for emerging artists and contemporary music in Portugal.