Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

For transmission line load matching over a range of frequencies, it is best to use a
A:
double stub
B:
balun
C:
single stub of adjustable position
D:
broadband directional coupler
Answer: A
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A loop antenna is a commonly used for
A:
radar
B:
direction finding
C:
satellite communication
D:
all of the above
Answer: B
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Many circles are drawn in a Smith chart used for transmission line calculations. The circle shown in the figure represents
A:
unit circles
B:
constant resistance circles
C:
constant reactance circles
D:
constant reflection coefficient circles
Answer: B
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Long distance short wave radio broadcasting based on
A:
line of sight
B:
ionospheric wave
C:
ground wave
D:
skywave
Answer: B
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A λ/8 section of transmission line is determined of load impedance of (2 - j 5) Ω. If characteristic impedance of line is 10 Ω. Then input impedance of line is
A:
10 Ω
B:
(6.9 + j 7.24) Ω
C:
(1.75 + j 3.098) Ω
D:
(2 - j 5) Ω
Answer: C
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