An H-plane high-power TEM ferrite junction circulator

In this paper a new junction circulator is described which consists of a composite junction having a beryllia disk sandwiched between two oversized garnet disks on each side of the TEM lines. In this way the r.f. power is evenly divided among four thin garnet disks. This approach results in a very large thermal capacity. A general characterization of the junction in terms of the experimental admittance function is also given. This approach is used to make the junction one of the resonators of a two-section filter. The final circulator was tested at 150 kW peak power and 2.5 kW average power at 1300 MHz.