Rectangular Waveguide Cavity Resonators MCQ

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• If the loss tangent of a rectangular waveguide is 0.0004, then Q due to dielectric loss is:
  ক

  1250

  খ

  2450

  গ

  2500

  ঘ

  1800
• The required length of the cavity resonator for l=1 mode (m=1, n=0) given that the wave number of the cavity resonator is 157.01 and the broader dimension of the waveguide is 4.755 cm:
  ক

  1.10 cm

  খ

  2.20 cm

  গ

  2.8 cm

  ঘ

  1.8 cm
• Find the wave number of a rectangular cavity resonator filled with a dielectric of 2.25 and designed to operate at a frequency of 5 GHz.
  ক

  157.08

  খ

  145.2

  গ

  345.1

  ঘ

  415.08
• Unloaded Q of a rectangular waveguide cavity resonator:
  ক

  Does not exist

  খ

  Defined as the ratio of length of the waveguide to breadth of the waveguide

  গ

  Defined as the ratio of stored energy to the power dissipated in the walls

  ঘ

  None of the mentioned
• Given the dimension of the waveguide as b<a<d, no resonant mode exists for this specification of dimensions.
  ক

  True

  খ

  False
• In order to obtain the resonant frequency of a rectangular waveguide, the closed cavity has to satisfy:
  ক

  Gaussian equation

  খ

  Helmholtz equation

  গ

  Ampere’s law

  ঘ

  None of the mentioned
• A waveguide is open circuited at both the ends to use it as a waveguide resonator.
  ক

  True

  খ

  False
• A rectangular cavity supports:
  ক

  TEM mode of resonance

  খ

  TM mode of resonance

  গ

  TE mode of resonance

  ঘ

  TE, TM modes of resonance
• There is no energy stored inside a rectangular waveguide cavity resonator.
  ক

  True

  খ

  False
• Microwave resonators can be constructed from open sections of waveguide.
  ক

  True

  খ

  False