ECE :: Electromagnetic Field Thoery
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Which one set of the following Maxwell's equation gives the basic idea of radiation ?
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When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ .
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Power gain and directivity related with, Gp power gain, Gd directive gain
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Radiation intensity in a given direction is the
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The capacitance between two spheres, whose separation is very much larger than their radii R, is given approximately as
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If ωε is the displacement current factor and s is conduction current density factor then which of the following statements is incorrect?
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Parabolic and lens antenna used at
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Which of the following statement regarding waveguides is incorrect?
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The potential that appears at a point in space due to the current which caused it is called potential
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It is desired to reduce the reflection at an air porcelain by use of 7/4 plate (for Porcelain μ = 40, and εr = 7). The thickness of the polystyrene plate required at 10 GHz will be
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A.
At waveguide can be coupled to a coaxial cable
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B.
At frequencies below the cut off value the wave progresses across the waveguide after total reflections
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C.
Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
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D.
Waveguides can handle large power at UHF and microwaves
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