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Microwave Engineering - Microwave Engineering
  1. Which of the following elements are taken in Microwave
    2. A.
    Lumped Circuit Elements
    B.
    Distributed Circuit Elements
    C.
    Both a & b
    D.
    None of these

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  2. Short term fading in microwave communication links can be overcome by
    3. A.
    Increasing the transmitted power
    B.
    Changing the antenna
    C.
    Changing the modulation scheme
    D.
    Diversity reception & transmission

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  3. _______ is the best medium for handling the large microwave power
    4. A.
    Coaxial line
    B.
    Rectangular wave guide
    C.
    Strip line
    D.
    Circular wave guide

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  4. Which of the following microwave tube amplifier uses an axial magnetic field & radial electric field
    5. A.
    Reflex Klystron
    B.
    Coaxial Magnetron
    C.
    Travelling Wave Magnetron
    D.
    Crossed field amplifier

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  5. Which of the following is the disadvantage of microstrips with respect to stripline circuit
    6. A.
    Do not let themselves to be printed circuits
    B.
    Are more likely to radiate
    C.
    Are bulkier
    D.
    Are more expensive & complex to manufacture

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  6. Most of the power measuring microwave devices measure
    7. A.
    Average power
    B.
    Peak power
    C.
    Instantaneous power
    D.
    None of these

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  7. HEMT(High Electron Mobility Transistor) used in microwave circuit is a _________
    8. A.
    Source
    B.
    Detector
    C.
    High power amplifier
    D.
    Low noise amplifier

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  8. In Microwave circuit , Wave guide section will act as a ______
    9. A.
    Low pass filter
    B.
    Band pass filter
    C.
    High pass filter
    D.
    Band reject filter

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  9. Which of the following is the biggest advantage of the TRAPATT diode over IMPATT diode
    10. A.
    Low Noise
    B.
    High efficiency
    C.
    Ability to operate at high frequencies
    D.
    Lesser sensitivity to harmonics

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  10. For which of the following reason, the Varactor diode is not useful at microwave frequencies
    11. A.
    For electronic tuning
    B.
    For frequency multiplication
    C.
    As an Oscillator
    D.
    As a parametric amplifier

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