Electronics and Communication Engineering - Electromagnetic Field Theory

11.
When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called
scattering
polarisation
absorption
dispersion
Answer: Option
Explanation:
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12.
The main disadvantage of the two-hole directional coupler is
poor directivity
narrow bandwidth
high standing wave ratio
low directional coupling
Answer: Option
Explanation:
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13.
The radiation pattern of a parabola antenna is
omnidirectional
a figure of directional
highly directional
none of the above
Answer: Option
Explanation:
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14.
The Q of a resonant transmission line is
Answer: Option
Explanation:
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15.
In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include
antenna replacement and feed correction
amplitude timing and phase correction
polarization shifting and code diversity
path diversity and frequency diversity
Answer: Option
Explanation:
No answer description is available. Let's discuss.