ECE :: Electromagnetic Field Thoery
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Which of the following wave remains unaffected during day and night?
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The phase velocity of an EM wave propagating in a hollow metallic rectangular waveguide in the TE10 mode is
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The electric field of an EM wave propagating in the z direction given by
The wave is -
Which of the following waves do not exist in waveguides?
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The bidirectional pattern of a broadside array can be converted into unidirectional by
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VLF waves are used for communication system because
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A.
maintaining the distance of λ/4 between the elements
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B.
maintaining the distance of λ/2 between the elements
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C.
installing an identical array behind the main array at distance λ/4 and exciting it by current leading in phase by 90°
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D.
installing an identical array behind the main array at distance λ/2 and exciting it by current leading in phase by 120°
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