Q. The gain of collinear arrays is maximum when the spacing between the elements is

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Q. Virtual height of an ionospheric layer is always greater than its actual height.

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Q. In waveguides the existing waves are

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Q. The term __________ applies to troposcatter propagation

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Q. Unit of e is __________ .

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Q. So-called 'grounded' antennas are often found insulated from the ground electrically.

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Q. End fire array is called a linear resonant dipole array.

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Q. Which of the following statements is incorrect regarding Balun transformer?

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Q. The maximum usable frequency for the 'E' layer is 10 MHz.

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Q. In free space

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Q. An alternating current or voltage is that which

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Q. When the magnetic vector is parallel to the boundary surface and electric vector is parallel to the place of incidence, the polarization is

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Q. The total electrical energy emitted overall space from an electron of charge e and radius r is

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Q. In broadside array

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Q. Which of following antenna does not depend upon the frequency?

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Q. A unipole is also known as

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Q. Microwave signals follow the curvature of the earth and the phenomenon

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Q. Broadcasting antennas are generally

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Q. A transmission line has characteristics impedance of (75 + j 0.01) Ω and is terminated in a load impedance of (70 + j 50) Ω. The reflection coefficient will be

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Q. Which of the following term does not apply to the Yagi-Uda array?

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