January 1997
Beginner
435 pages
18h 29m
English
Content preview from Microwave and Wireless Communications Technology
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Directional Couplers
157
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(A)
(B)
S
Figure 7-16
A) Side-coupled version;
B) broadside-coupled.
Consider a wave propagating from port I to port 2. When the wave passes
slot a, energy is radiated into the coupled guide, where it radiates in both direc-
tions. The main guide wave continues to propagate toward slot b. Part of the wave
couples through slot b into the other guide. As before, the coupled wave propa-
gates in both directions in the other guide. The portion that propagates towards
port 4 is in
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