A Multi-Octave Frequency Selective Limiter

A frequency selective limiter operating over more than 2 octaves bandwidth has been developed. The design uses single crystal ephaxial YIG films. Limiting threshold and leakage are about 1 milliwatt. Dynamic range approaches 20 dB. Selectivhy bandwidth for 3 dB weak signal compression is about +- 20 MHz at 100 mW input. An analytical method gives accurate predictions of limiting behavior when linear loss terms are included.