Optimal dielectric and cavity configurations for improving the efficiency of electron paramagnetic resonance probes

[Display omitted] •A probe made of a dielectric (DR) and a cavity (CV) is studied.•Its Λ efficiency in terms of the ΛDR and ΛCV components is derived.•For CVs with a high Q, the DR with highest ΛDR. gives the best Λ.•For CVs with a low Q, the DR with highest εr gives the best Λ.•For lossy samples or...

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