An Etymological Dictionary of Astronomy and Astrophysics

1. General: A device or a set of wires that receives or sends out radio signals.
   

2. In radio astronomy, the major dish-like component or wired structure used to collect radio signals.

Etymology (EN): L. antenna “sail yard,” the long yard that sticks up on some sails, of unknown origin, perhaps from PIE base *temp- “to stretch, extend.”
In this sense, it is a translation of Gk. keraiai “horns” (of insects).

Etymology (PE): Âten, from Fr. antenne, from L. as above.