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Radiation & Microwave Theory (RMT) important questionsMost repeated in SPPU papers

These 39 questions appeared in more than one SPPU Radiation & Microwave Theory paper we have: 11 papers, from Oct 2022 to Nov 2025. The most-asked come first. Each one links to the papers it was asked in.

All RMT papers and notes

Repeated questions

Endsem questions (31)

  1. 6×asked

    Draw and explain working principle of two hole directional coupler with its scattering matrix.

    Nov 2025 ·May 2025 ·May 2024 ·Nov 2023 ·May 2023 ·Nov 2022

  2. 6×asked

    Draw the construction and explain working of TRAPATT diode.

    Nov 2025 ·Nov 2024 ·May 2024 ·Nov 2023 ·May 2023 ·Nov 2022

  3. 5×asked

    Explain the operation of two cavity klystron with its constructional diagram.

    Nov 2025 ·Nov 2024 ·May 2024 ·Nov 2023 ·May 2023

  4. 4×asked

    Explain the phase focusing effect in cavity magnetron.

    May 2024 ·Nov 2023 ·May 2023 ·Nov 2022

  5. 4×asked

    What are the limitation of conventional tubes at microwave frequencies?

    May 2024 ·Nov 2023 ·May 2023 ·Nov 2022

  6. 3×asked

    Draw the construction of single cavity klystron tube and explain its working.

    Nov 2025 ·May 2024 ·May 2023

  7. 3×asked

    Explain application of PIN diode as a modulator with neat diagrams.

    Nov 2025 ·May 2025 ·Nov 2024

  8. 3×asked

    With the help of Constructional Details explain the operating principle of Reflex Klystron.

    May 2025 ·Nov 2024 ·Nov 2022

  9. 3×asked

    With the help of constructional diagram explain the working of Schottky Barrier Diode.

    Nov 2024 ·May 2024 ·May 2023

  10. 3×asked

    An Isolator has an insertion loss of 0.5db and an isolation of 30 dB. Determine the Scatting matrix of the isolator if the isolated ports are perfectly matched to the junction.

    May 2024 ·Nov 2023 ·May 2023

  11. 3×asked

    Distinguish between TWTA and Klystron Tube. 2

    May 2024 ·Nov 2023 ·May 2023

  12. 2×asked

    Explain construction and working principle of tunnel diode with its VI characteristics.

    Nov 2025 ·Nov 2024

  13. 2×asked

    Explain impedance measurement using slotted transmission line.

    Nov 2025 ·Nov 2024

  14. 2×asked

    Discuss the roll of Microwave Attenuator. Explain the Card/Fixed type of attenuator.

    May 2025 ·Nov 2022

  15. 2×asked

    Distinguish between the Klystron tube and Travelling wave tube amplifier.

    May 2025 ·Nov 2022

  16. 2×asked

    Enlist the characteristics of Scattering Matrix. Derive the scattering matrix for E-Plane Tee.

    May 2025 ·Nov 2022

  17. 2×asked

    Using suitable block diagram explain the operating principle of RADAR. Enlist the applications of RADAR.

    May 2025 ·Nov 2022

  18. 2×asked

    What is the slow wave structure? Explain how a helical TWT achieves amplification.

    May 2025 ·Nov 2022

  19. 2×asked

    Write a note on radiation hazard levels for personnel.

    May 2025 ·Nov 2023

  20. 2×asked

    Write a note on: Medical Application such as Microwave Diathermy.

    May 2025 ·Nov 2022

  21. 2×asked

    Explain construction and working of H plane tee.

    Nov 2024 ·May 2023

  22. 2×asked

    Explain Gunn effect using two valley theory.

    May 2024 ·May 2023

  23. 2×asked

    Explain reflectometer method for measurement of impedance.

    May 2024 ·Nov 2023

  24. 2×asked

    Explain the Cavity Magnetron with Hull cut off condition in detail.

    May 2024 ·May 2023

  25. 2×asked

    Explain the phase shift measurement using double minimum method at microwave frequency.

    May 2024 ·May 2023

  26. 2×asked

    State the properties of S - matrix and derive S matrix for E plane Tee.

    May 2024 ·Nov 2023

  27. 2×asked

    With neat schematic diagram explain the operation of Gyrator. Also State S - matrix for it.

    May 2024 ·May 2023

  28. 2×asked

    Write a note on measurement of quality factor.

    May 2024 ·May 2023

  29. 2×asked

    Write short note on effect of Microwave radiation on human.

    May 2024 ·May 2023

  30. 2×asked

    Write the comparison between PN junction diode and Schottky diode.

    May 2024 ·May 2023

  31. 2×asked

    Explain how Magic Tee is used for impedance measurement.

    Nov 2023 ·Nov 2022

Insem questions (8)

  1. 3×asked

    Explain in details radiation mechanisms of an antenna.

    Aug 2025 ·Sep 2023 ·Oct 2022

  2. 3×asked

    Give the comparison between waveguides and co-axial cables. 

    Aug 2025 ·Sep 2023 ·Oct 2022

  3. 2×asked

    Explain various radiation patterns of an antenna in detail.

    Aug 2025 ·Sep 2024

  4. 2×asked

    Derive the fundamental equation for free space propagation.

    Sep 2023 ·Oct 2022

  5. 2×asked

    Explain the constructional details, advantages and applications of re-entrant type of cavity resonator.

    Sep 2023 ·Oct 2022

  6. 2×asked

    Explain the following characteristics of antenna in detail: i) Radiation Pattern ii) Efficiency

    Sep 2023 ·Oct 2022

  7. 2×asked

    Explain the Structural details, types and applications of Striplines.

    Sep 2023 ·Oct 2022

  8. 2×asked

    What are micro waves. Enlighten on advantages and applications of microwave.

    Sep 2023 ·Oct 2022

Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.