Uberwaltz, In case of regular cable coiling doesn't matter, since cable is not a wire but the pair of them with opposite direction currents, that produce opposing magnetic flux. That would be a common mode choke, and that's how non inductive bifilar resistors are wound. I think, that magnetic field on the outside of the coax cable is zero, otherwise coiling coax would change its inductance, resulting in change of characteristic impedance (being roughly SQRT(L/C) ) and we would have huge, noticeable problem.
You can find similar conclusion here:
https://pages.uncc.edu/phys2102/online-lectures/chapter-7-magnetism/7-3-amperes-law/example-magnetic...
I don't think that coiling coax creates any antenna. The fact the people usually coil coax to >12"dia. is likely only to avoid mechanical damage (often multiple layers of shield).
You can find similar conclusion here:
https://pages.uncc.edu/phys2102/online-lectures/chapter-7-magnetism/7-3-amperes-law/example-magnetic...
I don't think that coiling coax creates any antenna. The fact the people usually coil coax to >12"dia. is likely only to avoid mechanical damage (often multiple layers of shield).