Antenna and Microwave Engineering MCQs with answers Page - 7

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Q. Reflector antennas are widely used to modify radiation patterns of radiating elements.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

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Q. The pattern of the reflector in a reflector antenna is called:

  • (A) primary pattern
  • (B) secondary pattern
  • (C) reflector pattern
  • (D) none of the mentioned

A

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Q. antennas have gain less than reflector antennas but have more lenient tolerance on surfaces.

  • (A) helical antennas
  • (B) lens antennas
  • (C) array antennas
  • (D) slot antennas

A

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Q. Lens antennas are classified into two types. One being fast antenna, the other one is:

  • (A) slow antenna
  • (B) delay antenna
  • (C) dynamic antenna
  • (D) none of the mentioned

A

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Q. The antennas which offer high operational bandwidth and the antenna parameters are maintained over a wide range of antennas are called:

  • (A) wide band antennas
  • (B) array antennas
  • (C) parabolic antennas
  • (D) none of the mentioned

A

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Q. High directivity required in RADAR communication is satisfied using this type of antennas:

  • (A) wide band antennas
  • (B) antenna arrays
  • (C) slot antennas
  • (D) patch antennas

A

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Q. The terminal impedance of a dipole antenna is 710 Ω. The terminal impedance of the slot antenna given the intrinsic impedance of air is 377 Ω is:

  • (A) 100 Ω
  • (B) 50 Ω
  • (C) 25 Ω
  • (D) none of the mentioned

A

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Q. When the separation between two lines that carry the TEM wave approaches λ the wave tends to be radiated.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

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Q. An antenna has a field pattern of E (θ) = cos2 θ, θ varies between 0 and 900. Half power beam width of the antenna is:

  • (A) 330
  • (B) 660
  • (C) 12000
  • (D) none of the mentioned

A

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Q. Power radiated from an antenna per unit solid angle is called radiation intensity.

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

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