"Tracy Hall" wrote in message
oups.com...
I understand that coaxial cable does not radiate much energy because
symmetric opposing current sheets in the outer skin of the center
conductor and the inner skin of the shield essentially balance each
other.

Suppose I route coax through a strong DC magnetic field, such as in an
MRI, with the magnetic field perpendicular to the cable axis. Will the
current distribution in the center conductor then become biased "up"
with respect to the field (right hand rule), and the current
distribution in the shield then become biased "down," thereby
destroying symmetry?

If so, will the coax then radiate and become lossy?

Can anyone point me to an analysis of this problem?


no, the coax fields still cancel at a distance (small)

But most coax is between 90% and 98% covered, not 100%, so there can be
leakage into or out of but not at DC, there is no effect on the coax (which
is high frequency)