Microwave Engineering MCQ

Test your knowledge with important Microwave Engineering MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Microwave Engineering MCQs at Bissoy

• If the third order intercept point of a receiver is 35 dBm and the total noise in the receiver is -47.4 dBm signals to noise ratio is 10, then the spurious free dynamic range is:
  ক

  50.9 dB

  খ

  44.9 dB

  গ

  34.9 dB

  ঘ

  67 dB
• For a receiver, 1 dB compression point is 25 dBm and the noise power at the receiver output is -47.4 dBm, the linear dynamic range is:
  ক

  70 dB

  খ

  72.4 dB

  গ

  68 dB

  ঘ

  85 dB
• A receiver has a noise figure of 7 dB, gain of 40 dB, noise temperature is 290 K. then the noise power at the receiver is:
  ক

  47. 4 dBm

  খ

  -47.4 dBm

  গ

  23 dBm

  ঘ

  -23 dBm
• Passive intermodulation is significant only when:
  ক

  The input signal levels are low

  খ

  Input signal levels are high

  গ

  Input signal is sinusoidal

  ঘ

  Input signal is exponential
• The expression for linear dynamic range is given by:
  ক

  OP1 dB- No

  খ

  OP1 dB/ No

  গ

  OP1 dB+No

  ঘ

  None of the mentioned
• ________ is defined as the operating range for which a component or system has desirable characteristics.
  ক

  Static range

  খ

  Dynamic range

  গ

  Characteristic gain

  ঘ

  None of the mentioned
• Inter modulation distortion occurs only in active non linear devices and they are the only source of inter modulation distortion.
  ক

  True

  খ

  False
• In a non coherent cascade network, if the third order intercept point of an amplifier is 158 mW and the third order intercept point of a mixer is 5 mW, with an insertion loss of 6 dB, then the third order intercept point of the coherent cascade is:
  ক

  3 mW

  খ

  4.9 mW

  গ

  5.2 mW

  ঘ

  2 mW
• In a coherent cascade network, if the third order intercept point of an amplifier is 158 mW and the third order intercept point of a mixer is 5 mW, with an insertion loss of 6 dB, then the third order intercept point of the coherent cascade is:
  ক

  2 mW

  খ

  4 mW

  গ

  4.4 mW

  ঘ

  5 mW
• If the third order input intercept point of a mixer is 13 dBm and if the mixer has a conversion loss of 6 dBm, then the third order intercept point at the output is:
  ক

  3 dBm

  খ

  7 dBm

  গ

  4 dBm

  ঘ

  2 dBm
• If the field strength at receiving antenna is 1 µV/m, and the effective aperture area is 0.4 m2 and the intrinsic impedance of the medium is 377 Ω, then the power received by the antenna is:
  ক

  1.06 pW

  খ

  1.06 fW

  গ

  2 µW

  ঘ

  None of the mentioned
• Considering distance as a parameter, two types of field zones can be defined around an antenna.
  ক

  True

  খ

  False
• A source with a unidirectional cosine squared radiation intensity pattern is given by UMcos2 (θ). The directivity of the given source is:
  ক

  6

  খ

  8

  গ

  2

  ঘ

  7
• A source has a sine squared radiation intensity power pattern. The directivity of the given source is:
  ক

  1.5

  খ

  3

  গ

  2.5

  ঘ

  3.5
• A source has a radiation intensity pattern given by U=UM sin θ. The directivity of the source with this power pattern is:
  ক

  1

  খ

  1.27

  গ

  2.4

  ঘ

  3.4
• A source has a cosine power pattern that is bidirectional. Given that the directivity of a unidirectional source with cosine power pattern has a directivity of 4, then the directivity of the unidirectional source is:
  ক

  1

  খ

  2

  গ

  4

  ঘ

  8
• A source has a cosine radiation-intensity pattern given by U=UM cos (θ). The directivity of this source is:
  ক

  2

  খ

  4

  গ

  6

  ঘ

  8
• The expression for pointing vector of an isotropic point source at a distance ‘r’ from the source is given by:
  ক

  P/ 4πR2

  খ

  P/4π

  গ

  P/ 4πR

  ঘ

  P×4πR2
• Antennas that radiate energy only in a specified are called anisotropic antennas.
  ক

  True

  খ

  False
• An antenna source that radiates energy uniformly in all the directions is called:
  ক

  Isotropic source

  খ

  Anisotropic source

  গ

  Point source

  ঘ

  None of the mentioned
• If the directivity of a square corner receiving antenna is 20 and operating at a wavelength of 0.25m, the effective aperture of a square corner antenna is:
  ক

  0.4 m2

  খ

  0.2 m2

  গ

  0.1 m2

  ঘ

  None of the mentioned
• If the length of aperture in a pyramidal horn antenna is 10cm and δ for the design is 0.25. Then, the flaring angle of the pyramidal horn is:
  ক

  30⁰

  খ

  25.4⁰

  গ

  45⁰

  ঘ

  60⁰
• 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:
  ক

  100 Ω

  খ

  50 Ω

  গ

  25 Ω

  ঘ

  None of the mentioned
• High directivity required in RADAR communication is satisfied using this type of antennas:
  ক

  Wide band antennas

  খ

  Antenna arrays

  গ

  Slot antennas

  ঘ

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

  Wide band antennas

  খ

  Array antennas

  গ

  Parabolic antennas

  ঘ

  None of the mentioned
• Lens antennas are classified into two types. One being fast antenna, the other one is:
  ক

  Slow antenna

  খ

  Delay antenna

  গ

  Dynamic antenna

  ঘ

  None of the mentioned
• ______ antennas have gain less than reflector antennas but have more lenient tolerance on surfaces.
  ক

  Helical antennas

  খ

  Lens antennas

  গ

  Array antennas

  ঘ

  Slot antennas
• The pattern of the reflector in a reflector antenna is called:
  ক

  Primary pattern

  খ

  Secondary pattern

  গ

  Reflector pattern

  ঘ

  None of the mentioned
• Reflector antennas are widely used to modify radiation patterns of radiating elements.
  ক

  True

  খ

  False
• Patch antennas are the antennas of small size and are made of:
  ক

  Strip line

  খ

  Microstrip lines

  গ

  Coaxial cables

  ঘ

  Rectangular waveguide