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Home ‣ Electronics and Communication Engineering ‣ Microwave Communication Comments
  • Question

  • A TR (transmitter receiver) tube has


  • Options
  • A. low loss for low power signals and high
  • B. high loss for low power signals and low loss for high level signal
  • C. low loss for both low level and high level signals
  • D. high loss for both low level and high level signals

  • Correct Answer
  • low loss for low power signals and high 

    • Microwave Communication problems

    Search Results

    • 1. A directional coupler is used to determine

    • Options
    • A. rv
    • B. rv and VSWR
    • C. L and C
    • D. wave velocity
      • Discuss
    • 2. Radar is essentially an echo ranging system

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. In a microwave coaxial cable the inner conductor radius is a and inner radius of outside conductor is b. For TE11 mode the cut off wavelength is about

    • Options
    • A. a + b
    • B. p(a + b)
    • C. pa
    • D. pb
      • Discuss
    • 4. The attenuation characteristics of a loaded line is similar to that of

    • Options
    • A. low pass filter
    • B. high pass filter
    • C. band pass filter
    • D. band stop filter
      • Discuss
    • 5. For air filled circular waveguides

    • Options
    • A. the attenuation due to imperfect conducting walls is negligible
    • B. the attenuation due to imperfect dielectric is negligible
    • C. both the attenuation i.e. due to imperfect conducting walls and due to imperfect dielectric are significant
    • D. the total attenuation is almost zero
      • Discuss
    • 6. Assertion (A): In TE10 mode the cutoff frequency of rectangular waveguide is where a is the broad dimension and c is velocity of light.

      Reason (R): TE10 mode is the dominant mode in rectangular waveguide.


    • Options
    • 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
      • Discuss
    • 7. Which mode has the minimum cutoff frequency in rectangular wave guides?

    • Options
    • A. TE11
    • B. TE10
    • C. TE01
    • D. TE20
      • Discuss
    • 8. The radiation resistance of a doublet antenna of length dl is proportional to

    • Options
    • A. ? l
    • B. (? l)2
    • C. (? l)3
    • D. (? l)05
      • Discuss
    • 9. Assertion (A): A small section of high impedance line is equivalent to a series inductance.

      Reason (R): A small section of a low impedance line is equivalent to a series resistance.


    • Options
    • 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
      • Discuss
    • 10. When duct propagation exists

    • Options
    • A. the line of sight and diffraction. Zone concepts are payable
    • B. the line of sight and diffraction zone concepts are not applicable
    • C. line of sight concept is applicable but diffraction zone concept is applicable
    • D. diffraction zone concept is not applicable but line of sight concept is not applicable
      • Discuss

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