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-1 section-2

Directional couplers are mainly used

A) To measure power B) To split power C) To combine power D) All of these

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Answer & Solution

Answer: Option D

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Multiple collectors are used in Traveling Wave Tube (TWT) to:

A) To distribute the dissipated heat evenly B) To increase the overall efficiency C) To increase the gain of the TWT D) To shape the electron beam

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Answer & Solution

Answer: Option B

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Travelling wave tube is suitable for

A) broad frequency band of operation B) low noise amplification C) narrow band of operation D) handling low power operation

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Answer & Solution

Answer: Option A

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Which of the following devices cannot be used as microwave oscillator:

A) IMPATT diode B) PN Junction diode C) TRPATT diode D) BARRITT diode

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Answer: Option B

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The waveguide (a = 1.5 cm, b = 1 cm) is loaded with dielectric (ε_r = 4). Which one of the following is correct?
The 8 GHz signal will

A) pass through the waveguide B) not pass through the waveguide C) be absorbed in the guide D) None of the above

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Answer & Solution

Answer: Option A

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What is the critical frequency for reflection at vertical incidence if the maximum value of electron density is 1.24 × 10⁶ cm^-3?

A) 12.0215 MHz B) 8.0215 MHz C) 10.0260 MHz D) 25.0215 MHz

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Answer & Solution

Answer: Option C

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Travelling wave tube (TWT) is basically

A) Wideband amplifier B) Tuned amplifier C) An oscillator D) None of the above

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Answer: Option A

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TM₀₁ mode in rectangular perfect metallic waveguide is:

A) Propagating mode B) Evanescent mode C) Non-existent mode D) None of the above

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Answer & Solution

Answer: Option C

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Klystron operation is based on the principle of

A) Velocity modulation B) Amplitude modulation C) Frequency modulation D) Phase modulation

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Answer & Solution

Answer: Option A

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The transmit time in the repeller space of a reflex klystron must be (n + 3/4) cycles to ensure that,

A) Electrons are accelerated by the gap voltage on their return B) Returning electrons give energy to the gap oscillations C) It is equal to the period of the cavity oscillations D) The repeller is not damaged by striking electrons

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Answer & Solution

Answer: Option B

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