Giant satellite VHF antenna for space-based air traffic service (nanoavionics.com)

Interesting. I'm surprised this wasn't done before.

that is a really large helical antenna as the video thumbnail. Probably the second largest i've seen a picture of.

ADS-B isn't VHF, though; and i have antennas for working satellites. Not as large as that giant slinky, but still quite large.