Q. As compared to dimensions of most feeds, the skin depth at microwave frequencies is

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Q. In microwave communication links the fading due to rain occurs. The methods to solve this problem include

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Q. Which of the following is not used as a microwave mixer or detector?

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Q. Integrated fin line can be utilized as a medium for constructing millimeter wave circuits.

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Q. The secondary constants of a line are

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Q. In a loss less line the propagation constant is equal to

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Q. A rectangular wave guide has two stubs each of length λ/4 connected at the source end. The stubs are circuited. Then the stubs present

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Q. Which one of the following is also called 'rat race'?

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Q. Radar principle is used in

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Q. In an optional fiber the refractive index of cladding material should be

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Q. In microwave circuits, a mode transducer is used to

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Q. A waveguide connected to a circularly polarized antenna must be able to efficiently propagate both vertically and horizontally polarised waves.

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Q. Assertion (A): Inter-digitated geometry is widely used for microwave transistors.

Reason (R): Tuning at input and output of transistor uses MOS chip capacitors.

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Q. For a 1 cm x 2 cm air filled rectangular waveguide the maximum frequency should be less than about

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Q. Hollow waveguides are used as transmission lines at frequencies

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Q. To ensure that only dominant TE₁₀ mode propagates in a rectangular waveguide, the operating frequency

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Q. In a microwave power measurement using bolometer, the principle of working is variation of

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Q. Z₀ = (Zoc Zsc)^0.5

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Q. A microwave junction is matched at all ports if the S matrix

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Q. Assertion (A): A line of length slightly more than λ/4 and open circuited at far end is equivalent to an inductive reactance.

Reason (R): A line of length slightly more than λ/4 and short circuited at far end behaves as a capacitive reactance.

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