A square corner reflector is used in
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ECE · all questionsElectromagnetic Field Theory
Electromagnetic Field Theory
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In microwave communication links, when fading due to rain attenuation occurs then technique adopted for solving the problem would include
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The power gain of a half-wave dipole with respect to an isotropic radiator is
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MUF is highest in periods of greatest sunspot activity.
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The attenuation in waveguide above to cut off frequency
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A waveguide operated below cut off frequency can be used as
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The wave in wave guide has
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Radiation intensity in a given direction is the
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Which of the following impedance inversion is obtained?
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When a conductor moves in the field, so that it makes an angle 8 with the lines of flux, the force F is given as : F = Bl sin2 0.
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High range resolution is obtained with
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The input impedance of a short circuited lossless transmission line quarter wave long is
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A loss-less line length x such that is connected in between a line of characteristic impedance of 100 Ω and a load impedance of 400 Ω. The line so connected should have a characteristic impedance of
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Inside a hollow conducting sphere
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If the maximum electron density for E layer in ionosphere is 9 × 106 electrons/cm3, then its critical frequency is
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For a perfectly matched line the reflection coefficient has value of:
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The electric field inside a metal is always . . . . . . . .
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Impedance inversion may be obtained with-
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Which of the following is correct?
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Three point charges, Q1 = 30 nC, Q2 = -150 nC, and Q3 = 70 nC, are enclosed by surface S. What net flux crosses S?
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