WAVEGUIDE JUNCTIONS are of several basic types. The T-JUNCTION may be either of the E-
TYPE or the H-TYPE. The effect on the input energy depends upon which arm is used as the input. The
MAGIC-T HYBRID JUNCTION, shown at the right, is a combination of the E- and H-type T junctions.
FERRITE DEVICES combine magnetic properties with a high resistance to current flow. Ferrites
are constructed from compounds of ferrous metal oxides to achieve the desired characteristics. The fact
that the spin axes of electrons will wobble at a natural resonant frequency when subjected to an external
magnetic field is the basic principle of operation of ferrite devices. The position of a typical ferrite device
within a waveguide is shown in the figure.