
173Microwave Ferrite Devices
a more compact structure, makes construction simpler and possesses more
peak power-handling capacity.
As shown in Figure 5.12, the tapered ferrite slab is located at a/4 distance
from one of the broader walls of width ‘a’ of the rectangular waveguide. The
dominant TE
10
mode in the rectangular waveguide is under the inuence of
the magnetic eld and in this unique location of ferrite, the wave gets circu-
larly polarised. This polarisation is in one direction for its forward travel and
in the other direction for backward travel. This results in propagation in one
direction and attenuation in the other. By proper design, ...