Figure 120.
Correct and Incorrect Joint Connections.
d. Rotating and fixed choke joints are just two variations of basic
waveguide. Some other variations are bends, twists, and flexible waveguide.
Let's see what these types of waveguide look like, and learn why we use
them.
23. Waveguide bends guide RF energy around corners.
a. Sometimes, to extend waveguide from one place to another, such as
around a corner, a waveguide section is formed into a special shape called a
bend. Two kinds of waveguide bends are illustrated in Figure 121.
Figure 121.
Waveguide Bends.
b. The
bend in Part A of 116 is called a smooth bend, and the one in
Part B is a
mitered bend. The bends are special because they have specified
lengths.
Notice that the smooth bend radius must be at least two
for a 90
175
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