The Gyromagnetic Coupling Limiter at C-Band (Correspondence)

The original paper of DeGrasse and subsequent publications dealing with the use of the crossed-strip gyromagnetic coupler as a limiter have been concerned with the operation of this device below 3300 Mc. At these frequencies the limiter exhibits a sharp threshold at a very low power level, in the neighborhood of -20 dbm. Fig. 1 illustrates typical flat leakage characteristics at a frequency of 2600 Mc. A single crystal YIG sphere of 26 mils was used in this limiter.