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Microwave Communication - Engineering

Q1:

Consider the following statements about directional coupler shown in the figure
  1. Ports 1 and 2 are decouple
  2. Ports 3 and 4 are decoupled
  3. Pots 1 and 3 are decoupled
  4. Ports 1 and 4 are decoupled
Which of the above statements are correct?

A 1 and 2 only

B 3 and 4 only

C 1, 2 and 3

D 2, 3 and 4

ANS:A - 1 and 2 only

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