Microwave Communication MCQ Questions & Answers

Microwave Communication MCQ Questions & Answers | ECE

Learn Microwave Communication MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Microwave Communication MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-6 section-2

The frequency range of K band for the radar system is

A) 18 - 26.5 GHz B) 24.5 - 24.25 GHz C) 27 - 40 GHz D) 33.4 - 36.0 GHz

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Answer & Solution

Answer: Option A

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For a WR 90 waveguide, the cut-off frequency for TE₂₀ mode is 16 GHz. Then the cut-off frequency for TE₁₁ mode will be

A) $$4\sqrt 3 {\text{ GHz}}$$ B) $$6\sqrt 3 {\text{ GHz}}$$ C) $$8\sqrt 5 {\text{ GHz}}$$ D) $$16\sqrt 5 {\text{ GHz}}$$

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Answer & Solution

Answer: Option C

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A turnstile junction is a

A) Three-port junction B) Four-port junction C) Five-port junction D) Six-port junction

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Answer: Option C

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Consider a rectangular waveguide of internal dimension 8 cm × 4 cm Assuming an TE₁₀ mode of propagation, the critical wavelength would be

A) 8 cm B) 16 cm C) 4 cm D) 32 cm

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Answer & Solution

Answer: Option B

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Typical material thickness in micro-strip is

A) 0.001 mm to 0.01 mm B) 0.01 mm to 0.1 mm C) 0.1 mm to 1.5 mm D) 1 mm to 5 mm

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Answer: Option C

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Which of the following statement is correct in the directional coupler?

A) The coupling co-efficient is not particularly frequency sensitive but the directivity is a sensitive function of frequency B) The coupling co-efficient is particularly frequency sensitive but the directivity is not a sensitive function of frequency C) Both coupling co-efficient and directivity are sensitive functions of frequency D) Both coupling co-efficient and directivity are not sensitive functions of frequency

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Answer & Solution

Answer: Option A

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Gunn diode can replace reflex klystron in
1. Signal Generators
2. Frequency modulated power oscillators
3. Parametric amplifier pumps

A) 1 and 2 B) 1 alone C) 1, 2 and 3 D) 2 alone

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Answer & Solution

Answer: Option C

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At microwave frequencies, varactor diode is not useful

A) As an oscillator B) For electronic tuning C) As a parametric amplifier D) For frequency multiplication

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Answer & Solution

Answer: Option A

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A reflex klystron oscillator uses

A) one cavity resonator B) two cavity resonator C) three cavity resonator D) none of the above

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Answer & Solution

Answer: Option A

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A reflex klystron is capable of operating at such high frequencies as

A) 1 GHz B) 10 GHz C) 80 GHz D) 5 GHz

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Answer & Solution

Answer: Option B

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