Figure 130.
Radar RF System.
33. Handling waveguide.
a. You have learned in this lesson how such things as size, shape, and
termination affect waveguide.
These properties of waveguide must not be
changed or you will get some of the bad effects listed below.
b. For example, if dirt and moisture are allowed to collect inside a
section of waveguide, they may change the characteristics of the guide
enough to cause considerable loss of power. Also, if waveguide is dented,
unwanted reflections may occur and result in a considerable loss of power.
If waveguide is dented or terminated improperly, reflections may cause
arcing within the guide: So to ensure proper waveguide operation, remember
these three rules:
(1) Keep it clean!
(2) Keep it dry!
(3) Don't dent it!
34. Summary.
a. This lesson has explained that a waveguide is and how it works. You
have seen how waveguide is tuned and attenuated. You have also learned how
to couple waveguide to other RF components.
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