Mazda Radio Antena Failure

Not applicable
While I was driving my mazda 6 premium 2004 on the main highway of Israel I heard a bang noise on my back car.
Later I found my radio antena was broken.
It seems very danger that at that speed you can get an arrow from a moving car and it can cause a fatal death.
I'd like to know if any one did a research on this problem and found the possible failure of the antena.
I'd like to get recommendation how to operate the software FEMAP to solve this problem.
Zvika Greenberg - Haifa Israel