|man_made = antenna|
|Used for some kind of antennas.|
|Used on these elements|
|Tools for this tag|
Used to mark some kind of antennas. See also the other tags in use. For tagging of what is transmitted, you could have a look at the tags described in this proposal: Proposed_features/Telecommunications_tower.
There is a lot of tags for similar kind of objects in use. You are invited to check the other keys, and compare actual usage numbers with Taginfo.
Usage for man_made=antenna