The design, characterisation, manufacture and application of new, large area, quasi-optical Faraday rotators isdiscussed. When used as isolators these have given state of the art performance at W-band with isolations <60dB andinsertion loss < 0.5dB at spot frequencies.
M. R. Webb, M. R. Webb,
"High performance quasi-optical Faraday rotators", Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21045W (30 August 1993); doi: 10.1117/12.2298644; https://doi.org/10.1117/12.2298644