A transmission line discontinuity is defined as any interruption in the uniformi

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Question
A transmission line discontinuity is defined as any interruption in the uniformity of the line.
Options
A. True
B. False

Correct Answer

True

Microwave Communication problems

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1. A rectangular waveguide has two stubs each length connected at the source end. The stubs are short circuted. Then
Options
A. the longitudinal current is power current and current in stubs is reactive
B. the longitudinal current is reactive current and current in stubs is power current
C. both power and reactive exists in both longitudinal direction and stubs
D. the current in stubs is zero

2. Loading of a line means
Options
A. increasing inductance of line
B. increasing distributed inductance of line
C. decreasing distributed inductance of line
D. decreasing inductance of line

4. If a microstrip is enclosed in a metal enclosure
Options
A. the radiation losses are increased
B. the radiation losses are reduced RL
C. the capacitance becomes zero
D. the inductance becomes zero

5. Consider the following statements (L is the length of array between centres of end antennas and A is wave-length)
1. Width of major lobe between nulls of broad side array and end fire array are different.
2. Directive gain of broadside array and end fire array are different.
3. Directive gain of broadside array is 4
Which of the above statements are correct?
Options
A. 1, 2 and 3
B. 1 and 2 only
C. 1 only
D. 1 and 3 only

6. Interference generated by electrical equipment and automobile ignition systems when observed closed to earth is
Options
A. horizontally polarized
B. vertically polarized
C. polarized both horizontally
D. not polarized

8. Consider the following statements
1. Usable bandwidth of ridge wave guide is more than that of rectangular waveguide.
2. For a given value of TM₁₀ cutoff frequency the cross section of ridge wave guide is lesser that that of rect angular waveguide.
3. Ridge wave guide has higher conductor losser than a rectangular waveguide.
4. Ridge guide has higher conductor losser than a rectangular waveguide.
Which of the above statements are correct?
Options
A. 1 and 2 only
B. 1, 2 and 3 only
C. 2 and 3 only
D. All

10. In laboratory experiment the output from reflex klystron is moderated by square wave because
Options
A. it is easy to generate a square wave
B. crystal diode operates in square law region of i-v characteristics
C. it prevents frequency modulation
D. detector circuit is less complicated

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