Q. The input impedance for folded dipole antenna (two half dipole) is

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Q. Capacitance hats are installed on low frequency antenna is

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Q. Surface impedance at high frequencies is a consideration for

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Q. In a uniform plane wave E and H are related by

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Q. Antenna beamwidth is

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Q. The pure capacitor connected across an A.C. voltage consumed 20 W. This is due to

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Q. A dominant wave is characterised by which of the following?

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Q. The cut off wavelength λc for TE₂₀ mode for a standard rectangles waveguide is

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Q. F2 layer of atmosphere extends from

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Q. Whereas resonant antenna is bidirectional, non-resonant antenna is unidirectional.

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Q. In radar system if the antenna diameter is increased by a factor of 4, the minimum range will increased by a factor of

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Q. Which of the following antennas is λ /4 length?

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Q. The number of lobes on each side of a 31 resonant antenna will be

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Q. Analysis of EM wave in waveguide based on

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Q. The main difference between the broadside arrays and end fire arrays is that

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Q. The charges between a hollow and solid metal spheres reside

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Q. Maximum usable frequency is [fmuf]

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Q. The magnetic field due to current I equals

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Q. VLF is generally used for

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Q. In electromagnetic wave polarization is caused by

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