Electronics and Communication Engineering - Microwave Communication

51.
In a microwave resistor the wall thickness is made as small as possible to
have high value of R
have low value of R
minimize capacitive effect
reduce inductance
Answer: Option
Explanation:
No answer description is available. Let's discuss.

52.
In a klystron amplifier the transit time of electron passing the gap in the cavity should be
less than one cycle
less than half cycle
less than quarter cycle
more than quarter cycle
Answer: Option
Explanation:
No answer description is available. Let's discuss.

53.
In a cable with ∈r = 4, the wave velocity is
3 x 108 m/s
0.75 x 108 m/s
1.5 x 108 m/s
108 m/s
Answer: Option
Explanation:
No answer description is available. Let's discuss.

54.
In a backward wave oscillator the efficiency
is much higher than in TWT
is much lower than in TWT
is almost the same as in TWT
either (a) or (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.

55.
Consider the following statements
  1. Fading of signals is generally greatest near radio horizon.
  2. Fading of signals is generally greatest in shadow zone.
  3. Fading is small when a good optical path is present.
Which of the above statements are correct?
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
Answer: Option
Explanation:
No answer description is available. Let's discuss.