On Wednesday, October 11, 2017 at 2:46:30 AM UTC-5, Andy Burns wrote:
micky wrote:

The antenna that came on my 2005 Toyota is about 16" long and the top
ten inches have a wire coiled around in it, like the snake on a
caduceus. Does this wire do anything or is it just to impress people?

https://en.wikipedia.org/wiki/Helical_antenna

Actually, I don't believe that is the purpose. I think I've read that on automotive antennas, the winding is simply a means to reduce wind induced oscillation and noise.

Terry