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-7 section-2

Which one of the following can be used for amplification of microwave signals?

A) Gunn diode B) Strapped magnetron C) Reflex klystron D) Double cavity klystron

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Answer & Solution

Answer: Option D

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A cavity is a

A) low-pass filter B) high-pass filter C) band-pass filter D) band-stop filter

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Answer & Solution

Answer: Option C

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The modes in a rectangular waveguide are denoted by TE_mn/ TM_mn where m and n are the eigen numbers along the larger and smaller dimensions of the waveguide respectively.
Which one of the following statements is TRUE?

A) The TM₁₀ mode of the waveguide does not exist B) The TE₁₀ mode of the waveguide does not exist C) The TM₁₀ and TE₁₀ mode both exist and have the same cut-off frequencies D) The TM₁₀ and TE₀₁ mode both exist and have the same cut-off frequencies

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Answer & Solution

Answer: Option A

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Probe coupling is

A) Electrostatic B) Magnetic C) Either electrostatic or magnetic D) None of these

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Answer & Solution

Answer: Option C

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When a particular mode is excited in a wave guide, there appears an extra electric component in the direction of propagation. The resulting mode is

A) Transverse-electric B) Transverse-magnetic C) Longitudinal D) Transverse-electromagnetic

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Answer & Solution

Answer: Option B

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HEMT used in microwave circuit is a

A) Source B) High power amplifier C) Low noise amplifier D) Detector

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Answer & Solution

Answer: Option C

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Typical power gain of TWT amplifier is

A) 1 to 5 dB B) 50 to 300 dB C) 100 to 400 dB D) 20 to 40 dB

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Answer & Solution

Answer: Option D

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Which of the following is not a TWT slow wave structure

A) Coupled cavity B) Ring bar C) Helix D) Periodic permanent magnet

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Answer & Solution

Answer: Option D

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Baretters and Bolometers are used to measure

A) VSWR B) Transmission losses C) Microwave power D) Microwave frequencies

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Answer & Solution

Answer: Option C

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The TWT is sometimes preferred to the magnetron as a radar transmitter output tube because it is

A) Capable of longer duty cycle B) A more efficient amplifier C) More broad band D) Less noising

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Answer & Solution

Answer: Option A

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