2.45GHz microwave coupling to coil
EM waves „love“ to follow inductors.
There is a simple school experiment that shows this: Take a perfectly shielded box and put a (FM) radio inside it and listen. You will hear noise. Now penetrate the shield with some cable. You will probably hear sound/music.
You did not tell us the coil signal frequency. If it is far away from 2.45 GHz, you could build a filter.