Antenna and Microwave Engineering MCQs with answers Page - 12

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A

Admin • 802.91K Points
Coach

Q. IMPATT diodes employ impact ionization technique which is a noisy mechanism of generating charge carriers.

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

A

Admin • 802.91K Points
Coach

Q. An essential requirement for the BARITT diode is that the intermediate drift region be completely filled to cause the punch through to occur.

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

A

Admin • 802.91K Points
Coach

Q. If the RMS peak current in an IMPATT diode is 700 mA and if DC input power is 6 watt, with the load resistance being equal to

  • (A) 10.1 %
  • (B) 10.21 %
  • (C) 12 %
  • (D) 15.2 %

A

Admin • 802.91K Points
Coach

Q. If the critical field in a Gunn diode oscillator is 3.2 KV/cm and effective length is 20 microns, then the critical voltage is:

  • (A) 3.2 v
  • (B) 6.4 v
  • (C) 2.4 v
  • (D) 6.5 v

A

Admin • 802.91K Points
Coach

Q. The production of power at higher frequencies is much simpler than production of power at low frequencies.

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

A

Admin • 802.91K Points
Coach

Q. Microwave tubes are power sources themselves at higher frequencies and can be used independently without any other devices.

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

A

Admin • 802.91K Points
Coach

Q. The klystron tube used in a klystron amplifier is a type beam amplifier.

  • (A) linear beam
  • (B) crossed field
  • (C) parallel field
  • (D) none of the mentioned

A

Admin • 802.91K Points
Coach

Q. In crossed field tubes, the electron beam traverses the length of the tube and is parallel to the electric field.

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

A

Admin • 802.91K Points
Coach

Q. is a single cavity klystron tube that operates as on oscillator by using a reflector electrode after the cavity.

  • (A) backward wave oscillator
  • (B) reflex klystron
  • (C) travelling wave tube
  • (D) magnetrons

A

Admin • 802.91K Points
Coach

Q. A major disadvantage of klystron amplifier is:

  • (A) low power gain
  • (B) low bandwidth
  • (C) high source power
  • (D) design complexity

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