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

  • Fibers have numerical aperture (NA) in the range of 0.15 to 0.4 Fibers with higher NA value would have


  • Options
  • A. reduced losses
  • B. high bandwidth
  • C. reduced losses and low bandwidth
  • D. more losses and low bandwidth

  • Correct Answer
  • more losses and low bandwidth 

    • Microwave Communication problems

    Search Results

    • 1. A line of length slightly longer than and open circuited at far end behaves as

    • Options
    • A. inductance L
    • B. capacitance C
    • C. L and C in series
    • D. L and C in parallel
      • Discuss
    • 2. Integrated fin line can be utilized as a medium for constructing millimeter wave circuits.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. A 3 port circulator is in the given figure. Its scattering matrix is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. A rectangular wave guide has two stubs each of length connected at the source end. The stubs are circuited. Then the stubs present

    • Options
    • A. an infinite impedance in shunt with line
    • B. an infinite impedance in series with line
    • C. a zero impedance in shunt with line
    • D. a finite impedance in shunt with line
      • Discuss
    • 5. Hollow waveguides are used as transmission lines at frequencies

    • Options
    • A. above 1 GHz
    • B. above 5 GHz
    • C. above 10 MHz
    • D. above 1 MHz
      • Discuss
    • 6. The most commonly used magnetron is

    • Options
    • A. cylindrical
    • B. parallel plate
    • C. inclined plate
    • D. flat plate
      • Discuss
    • 7. Assertion (A): For a reciprocal microwave junction the S matrix is symmetrical.

      Reason (R): In a symmetrical matrix Sij = Sji.


    • 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
    • 8. In a waveguide the dielectric region is generally

    • Options
    • A. air
    • B. magnetic material
    • C. brass
    • D. mica
      • Discuss
    • 9. Which part of radio spectrum is more crowded?

    • Options
    • A. Lower frequency part
    • B. Higher frequency part
    • C. Both (a) and (b)
    • D. None of these
      • Discuss
    • 10. In the given figure the equivalent circuit of a T attenuator. If the condition for matched attenuator is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss

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