Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

The affect of ground on radiation pattern is to
A:
cause cancellation of radiation along the ground
B:
produce more number of nulls
C:
both (a) and (b)
D:
either (a) or (b)
Answer: C
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Long distance short-wave radio broadcasting uses
A:
ground wave
B:
ionospheric wave
C:
direct wave
D:
any of the above
Answer: B
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The best excited reflector from a wave guide is
A:
horn
B:
parabolic
C:
biconical
D:
corner
Answer: A
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A higher directivity is specified by
A:
high gain low BW (Beamwidth)
B:
high gain high BW
C:
low gain high BW
D:
none of the above
Answer: A
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A loss less transmission line is terminated in a load which reflects a part of the incident power. The measured VSWR is 2. The percentage of the power that is reflected back is
A:
57.73
B:
33.33
C:
0.11
D:
11.11
Answer: D
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