I'll go out on a limb and suggest the wording in this 1977 patent...
"[. . .] the interaction of the local r.f. magnetic fields with the magnetic moments associated with the atoms of the various metals making up a passive microwave component. One of the stronger of this class of interactions is that associated with ferromagnetic resonance, [. . .]
The invention focuses on this class of phenomena which is dependent upon the magnitude of a static magnetic field (generated internally or externally), whereby the generation of harmonics and other spurious signals by this effect is minimized through the use of appropriately placed magnets.
[. . .]
Utilizing additional conventional techniques to reduce harmonic generation at various junctions within the filter improved the second harmonic response to only about -70 dBm. However, applying small magnets 23 near the standard "non-magnetic" stainless steel coax connectors in accordance with the method of invention, easily improved the response to -90 dBm. Further adjustments in the placement of the magnets provided a response of less than -110 dBm, which was the sensitivity limit of the measurement system used."
...properly describes the very phenomena the Purdue team suggests is novel in their claim #1.
Good useful research? Yes. Novel? No.