Exercise: Microwave Communication

Questions for: Microwave Communication

As regards rectangular and circular waveguides
A:
both have infinite set of TE and TM modes
B:
rectangular waveguide has infinite TE and TM modes but not the circular waveguide
C:
circular waveguide has infinite TE and TM modes but not the rectangular waveguide
D:
none of the above
Answer: A
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For a directional coupler the power is in the ratio of
A:
40 dB
B:
30 dB
C:
20 dB
D:
10 dB
Answer: C
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In a magnetron the magnetic flux density is of the order of
A:
1 mWb/s
B:
1 Wb/m2
C:
106 m/s
D:
1012 m/s
Answer: A
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In a microwave coaxial cable the inner conductor radius is a and inner radius of outside conductor is b. For TE11 mode the cut off wavelength is about
A:
a + b
B:
p(a + b)
C:
pa
D:
pb
Answer: B
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If in line the characteristic impedance becomes real.
A:
True
B:
False
C:
D:
Answer: A
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