Electronics and Communication Engineering - Microwave Communication

36. 

Which one of the following can be used for amplification of microwave energy?

A. TWT
B. Magnetron
C. Reflex klystron
D. Gunn diode

Answer: Option A

Explanation:

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37. 

If ZTE is wave impedance for TE waves, Ed is maximum dielectric strength of insulating material, a and b are the width and height of a rectangular wave guide, the maximum power handling capability Pmax for TE10 mode is

A.
B.
C.
D.

Answer: Option B

Explanation:

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38. 

At frequencies of 10 MHz and higher the impedance represented by ground is primarity

A. resistive
B. inductive
C. capacitive
D. partly resistive and partly capacitive

Answer: Option C

Explanation:

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39. 

A disadvantage of microstrip line as the connections of compared to strip line is that former

A. do not lend themselves to printed circuit
B. are more likely to radiate
C. are bulky
D. are more expensive and complex

Answer: Option B

Explanation:

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40. 

As frequency increases, the transmission efficiency

A. decreases
B. increases
C. is not affected
D. either (a) or (c)

Answer: Option B

Explanation:

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