Q. Which of the antenna is best excited by a waveguide?

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Q. An end fire array consisting of several half-wave lengths of directive gain 40, then array length will be

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Q. Loop antennas are mostly employed for direction finding (DF) purposes because they are small and hence portable.

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Q. MF is generally used for

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Q. The attenuation in waveguides near the cut off frequency is

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Q. The ground waves eventually disappear as one moves away from the transmitter because of

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Q. The radiation resistance of a rod tubing antenna is

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Q. Power gain of an antenna in a given direction is the ratio of

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Q. The curve representing Ohm's law is

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Q. When a plane wave is incident normally from dielectric '1' (μ₀, ε1) onto dielectric '2' (μ₀, ε2) the electric field of the transmitted wave is 2 times the electric field of the reflected wave. The ratio ε2/ε1 is

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Q. The electric intensity for free space is given by

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Q. Which of following antenna not produces circular polarisation?

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Q. Purpose of antenna is

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Q. End fire coupler is formed

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Q. Antenna radiation efficiency can be increased by

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Q. Divergence of curl A is

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Q. If reflection coefficient is 1/5, then corresponding VSWR is given by

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Q. An open coil has

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Q. Antenna used for direction finding is

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Q. In E plane metal plate lens antenna

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