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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 4
46.
The electric field of an EM wave propagating in the z direction given by

The wave is
linearly polarized in z direction
elliptically polarized
left hand circularly polarized
right hand circularly polarized
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Which of the following waves do not exist in waveguides?
TE waves
TM waves
TE and TM waves
TEM waves
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
The bidirectional pattern of a broadside array can be converted into unidirectional by
maintaining the distance of λ/4 between the elements
maintaining the distance of λ/2 between the elements
installing an identical array behind the main array at distance λ/4 and exciting it by current leading in phase by 90°
installing an identical array behind the main array at distance λ/2 and exciting it by current leading in phase by 120°
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
VLF waves are used for communication system because
of low power requirement
they are least prone to distortion
they penetrate the ionosphere easily
the transmitting antennas are of convenient size
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
The radiation pattern of two element collinear array is represent in
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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