Exercise: Microwave Communication

Questions for: Microwave Communication

Consider the following statements about hybrid ring
  1. Ports 1 and 2 are decoupled.
  2. Port 3 and 4 are coupled.
  3. A signal entering either port 1 or 2 splits equally between ports 3 and 4.
  4. A signal entering either port 3 or 4 splits equally between ports 1 and 2.
Which of the above are correct?
A:
1, 2, 3 and 4
B:
1, 3 and 4
C:
1 and 2
D:
2, 3 and 4
Answer: B
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In a shield helix
A:
the spacing between adjacent turns is very large
B:
the spacing between adjacent turns approaches zero
C:
the spacing between adjacent turns approaches zero and wire thickness approaches zero
D:
the spacing between adjacent turns is very large wire thickness approaches zero
Answer: C
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Microwaves are used for
A:
telephony
B:
radio broadcast
C:
TV systems
D:
all of the above
Answer: D
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As compared to LED, LASER has
  1. higher emission efficiency
  2. no tuning arrangement
  3. narrow spectral width
  4. provision for confinement
Of these statements
A:
1, 2, 3 are correct
B:
1, 2, 4 are correct
C:
1 and 3 are correct
D:
1, 3, 4 are correct
Answer: D
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Standard mismatches are used to calibrate SWR and impedance measuring equipments.
A:
True
B:
False
C:
D:
Answer: A
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