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ECE :: Microwave Communication

Microwave Communication - Section 1
Microwave Communication - Section 2
Microwave Communication - Section 3
Microwave Communication - Section 4
Microwave Communication - Section 5
Microwave Communication - Section 6
Microwave Communication - Section 7
Microwave Communication - Section 8

  1. Which of the following modes of transmission will not be supported by a rectangular waveguide?

    2. A.
    TE15
    B.
    TE12
    C.
    TM11
    D.
    TM10

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  2. In a circular waveguide with radius r, the dominant mode is

    3. A.
    TM01
    B.
    TE01
    C.
    TM11
    D.
    TE11

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  3. If 'a' is the width of rectangular wave guide and 'λ' is the wave length, then

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  4. A parametric amplifier uses

    5. A.
    non linear resistance
    B.
    non linear reactance
    C.
    either (a) or (b)
    D.
    neither (a) nor (b)

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  5. Assertion (A): Impatt diode can be used in both amplifiers and oscillators.

    Reason (R): Impatt diode has a low resistance.

    6. A.
    Both A and R are correct and R is correct explanation of A
    B.
    Both A and R are correct but R is not correct explanation of A
    C.
    A is correct but R is wrong
    D.
    A is wrong but R is correct

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  6. Which one of the following can be used for amplification of microwave energy?

    7. A.
    TWT
    B.
    Magnetron
    C.
    Reflex klystron
    D.
    Gunn diode

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  7. If ZTE is wave impedance for TE waves, Ed is maximum dielectric strength of insulating material, a and b are the width and height of a rectangular wave guide, the maximum power handling capability Pmax for TE10 mode is

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  8. At frequencies of 10 MHz and higher the impedance represented by ground is primarity

    9. A.
    resistive
    B.
    inductive
    C.
    capacitive
    D.
    partly resistive and partly capacitive

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  9. A disadvantage of microstrip line as the connections of compared to strip line is that former

    10. A.
    do not lend themselves to printed circuit
    B.
    are more likely to radiate
    C.
    are bulky
    D.
    are more expensive and complex

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  10. As frequency increases, the transmission efficiency

    11. A.
    decreases
    B.
    increases
    C.
    is not affected
    D.
    either (a) or (c)

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