iPhone antenna band with dent on it

I tried searching high and low for an answer with no luck.

My question is about iPhone antenna bands. From what I’ve learned, they allow signals to enter and exit iPhone casing. What I couldn’t find is whether they “transfer” anything themselves.

Why I’m asking is because of the classic situation of dropping the phone and the fall left a dent in upper right antenna band. So, will having antenna band with dent effect iPhone’s functionality (or signal strength) in any way or is the damage just purely cosmetic?