Abstract
Nonlinear effects were investigated at 9375 Mc in ferrite-filled reduced-size rectangular waveguide with transversely applied magnetic fields. The cross-sectional area of standard X-band waveguide was reduced to as low as one-tenth its original value, maintaining approximately the same aspect ratio. Factors investigated were insertion loss, threshold power level, spike characteristics, dynamic range of limiting, and breakdown power level. These are discussed with relation to waveguide size, frequency, ferrite loading geometry, ferrite material parameters, and temperature. Thresholds as low as 3 w peak were observed using standard polycrystalline ferrite materials. It was possible to realize useable limiter configurations whose low power losses were less than 1 db. The application of these effects in the design of a compact X-band limiter are mentioned, as well as the advantages and limitations of devices utilizing these effects.
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