Q. Distances near the skip distance should be used for sky-wave propagation

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Q. End fire array has a dipole spacing of λ/2.

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Q. Which one of following is correct for broadside array?

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Q. The effective length of an antenna (Le) is

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Q. Curl of gradient A is

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Q. When microwave signals follow the curvature of the earth, this is known as

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Q. Characteristic wave impedance is

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Q. Consider isotropic radiator radiating a power of 1 watt. At a distance of 1 metre, the power per unit area with equal

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Q. Cassegrain feed is used with a parabolic reflection to

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Q. Which of the wave remains unaffected whether it is a day or night?

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Q. Which of the following is not an omnidirectional antenna?

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Q. The unit of magnetic flux density is

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Q. In a waveguide if TE mode exist for z direction propagation, then

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Q. Critical frequency of a layer in ionosphere

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Q. Which one is correct option?

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Q. A vertical loop antenna, like a horizontal dipole, is vertically polarised.

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Q. The attenuation in a waveguide near the cut off frequency is

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Q. The electric flux and field intensity inside a conducting sphere is

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Q. T.V. antennas are usually

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Q. Select the correct relation

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