ORIGINAL: ljrt
It has been posted here that when you coil the antenna around Carbon fiber that it does interfere with the signal. You can however run the antenna along the tail boom and secure it with tape. Just don't "COIL" it around it.
You would also be coiling the antenna around the wires to the tailrotor motor. This is probably more significant than wrapping them around carbon fiber. Just having the antenna routed close would not be a good idea, IMHO. Brushed motors, even with filter capacitors, produce broadband noise.