Interesting - I had not seen your link, until just now, but that sort of protection is exactly what I was thinking of.
Now, that said, the article at the link refers to 1 - 2 Tesla, or 10,000 to 20,000 Gauss. Where? At the surface of the “inflatable generator”? 10 kGauss is a STRONG field —much stronger flux density than you’d see at the surface of a conventional ceramic magnet, for example, and I challenge anybody to pull apart by hand (in the direction of magnetization) a couple of 6” diameter ceramic ring magnets (like those found in a medium price guitar speaker.)
For another comparison, Earth’s magnetic field at the surface ranges from 0.25 - 0.65 Gauss.
“Where?”
In the article, they propose putting the magnetic shield generator in space. About 675,000 miles off Mars (320 radius lengths), in a gravitationally stable balance point (Lagrange Point L1) in Mars’ orbit around the Sun.
There it could passively sit of it’s own (lack) of weight, without fuel demands to maintain orbit (only orientation - and to produce the huge magnetic field).