New concept of high peak-power junction circulators

The influence of the steady magnetic field H on the peak-power handling capability of a junction circulator is studied. Particularly when this magnetic field is above the limit magnetic field Hlim, no nonlinear. effects appear in the junction circulator. This principle of operation has been applied for the study and the realization of three port KU band and four port X and KU band junction circulators with high peak-power handling capability. The use of new Sm-Co5permanent magnets permits the realization of lighter and more compact circulators and differential phase-shift circulators well-known for high-peak power applications.