Ferrite High-Power Effects in Waveguides

Deterioration of ferrite devices caused by both high power thermal and nonlinear effects are discussed. It is shown that thermal effects can be described, at least qualitatively, by a simple exponential equation. A theoretical maximum power capacity is derived in terms of ferrite configuration parameters. The results of experiments with high peak powers at both S-band and X-band frequencies are compared with predictions of Suhl´s theory on nonlinear, high power effects in ferrites. Steady-state and transient effects are considered. It is shown that high power effects may be eliminated in ferrite devices by properly choosing ferrite properties and geometry.