1-28
Figure 1-37.—Counting wavelengths in a circular waveguide.
Figure 1-38.—Various modes of operation for rectangular and circular waveguides.
Waveguide Input/Output Methods
A waveguide, as explained earlier in this chapter, operates differently from an ordinary transmission
line. Therefore, special devices must be used to put energy into a waveguide at one end and remove it
from the other end.
The three devices used to inject or remove energy from waveguides are PROBES, LOOPS, and
SLOTS. Slots may also be called APERTURES or WINDOWS.
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