Electronics and Communication Engineering - Microwave Communication

26. 

A transmission line discontinuity is defined as any interruption in the uniformity of the line.

A. True
B. False

Answer: Option A

Explanation:

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27. 

Interference generated by electrical equipment and automobile ignition systems when observed closed to earth is

A. horizontally polarized
B. vertically polarized
C. polarized both horizontally
D. not polarized

Answer: Option B

Explanation:

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28. 

The earliest uses of electromagnetic waves were

A. point to point communication
B. radar
C. both (a) and (b)
D. neither (a) nor (b)

Answer: Option C

Explanation:

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29. 

At millimeter wavelength the favoured mode in circular wave guide is

A. TE01
B. TE11
C. TE20
D. TE21

Answer: Option A

Explanation:

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30. 

In laboratory experiment the output from reflex klystron is moderated by square wave because

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

Answer: Option B

Explanation:

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