# Electronics and Communication Engineering - Microwave Communication

Exercise : Microwave Communication - Section 7
1.
In terms of R, L, G and C the propagation constant γ of a transmission line is
Explanation:
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2.
The p mode of operation of magnetron signifies that
the phase difference between adjacent anode poles is a multiple of p radians
the total phase shift around the periphery is p radians
none of the above
Explanation:
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3.
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?
1, 2 and 3
1 and 2 only
1 only
1 and 3 only
Explanation:
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4.
The electrical requirement on wall thickness of rectangular wave guide is
wall thickness is more than skin depth
wall thickness is less than skin depth
wall thickness is equal to skin depth
either (b) or (c)
Explanation:
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5.
If a microstrip is enclosed in a metal enclosure
the radiation losses are reduced RL
the capacitance becomes zero
the inductance becomes zero