Q. Which one of the following is true for EM wave propagation through rectangular waveguide of cross-section 2a x a

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Q. In 8 cavity magnetron the π mode corresponds to a total phase shift equal to

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Q. Satellite communication systems use the frequency band

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Q. The characteristic impedance of a cable is about

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Q. A TR (transmitter receiver) tube has

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Q. A microwave connector should have high SWR.

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Q. Assertion (A): A small section of high impedance line is equivalent to a series inductance.

Reason (R): A small section of a low impedance line is equivalent to a series resistance.

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Q. Assertion (A): Bolometer is frequently used in microwave power measurement.

Reason (R): In a bolometer the input microwave power causes a change in resistance.

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Q. The radiation resistance of a doublet antenna of length dl is proportional to

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Q. Which of the following statements is not correct regarding modes of electromagnetic energy transmission?

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Q. The usable bandwidth of ridge wave guide

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Q. Assertion (A): In TE mode for rectangular waveguide.

Reason (R): In TM mode for rectangular waveguide.

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Q. The attenuation characteristics of a loaded line is similar to that of

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Q. A microstrip line has ∈r = 9. The normalised wavelength (λ/λ₀) is about

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Q. If the repeller voltage in a klystron oscillator is increased the transit time of electron

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Q. When duct propagation exists

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Q. If in line G/C = R/L, the characteristic impedance becomes real.

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Q. In a microwave coaxial cable the inner conductor radius is a and inner radius of outside conductor is b. For TE₁₁ mode the cut off wavelength is about

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Q. The rotation of direction of E field of a linearly polarized wave passing through a magnetised ferric medium is called

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Q. If air pressure in a rectangular waveguide is increased the maximum power handling capacity

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