The Unloaded Q of a YIG Resonator from X-Band to 4 Millimeters (Correspondence)

Carter and Flamrner have reported measurements at lower microwave frequencies of Q_u, the unloaded Q of a single crystal YIG sphere treated as a resonator. In their paper a comparison of the measured and theoretical Q_u, the latter computed on the basis of a constant relaxation time, yielded good agreement only in the 2-5 kMc range.