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EndsemNov 20252019 patternBE E&TC

Radiation & Microwave Theory (RMT) SPPU Endsem Question Paper Nov 2025

All 8 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated RMT questions
Subject code
404181
Pattern
2019 pattern
Exam
Endsem
Session
Nov 2025
Max. marks
70
Time
2½ Hours
Semester
VII
Paper code
[6584]-134

Printed for: B.E. (E & TC)

Instructions to the candidates

  1. Solve Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6, Q.7 or Q.8.
  2. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right indicate full marks.
  4. Use of calculator is allowed.
  5. Assume suitable data if necessary.

Questions

  1. Q1

    1. a)

      Draw and explain the principle of operation of isolator.

      [6]
    2. b)

      Draw Magic Tee and explain its working with the scattering matrix.

      [6]
    3. c)

      Draw H plane Tee and explain its working with its scattering matrix.

      [6]

  2. Q2

    1. a)

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

      Also asked:May 2025 ·May 2024 ·Nov 2023 ·May 2023 ·Nov 2022

      [6]
    2. b)

      A 10 dBm directional coupler has a directivity of 40dBm, if the applied input power P1 = 10mW, then calculate power outputs at port 2,3 and 4 of a lossless directional coupler.

      [6]
    3. c)

      Draw E plane Tee and explain its working with its scattering matrix.

      [6]

  3. Q3

    1. a)

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

      Also asked:Nov 2024 ·May 2024 ·Nov 2023 ·May 2023

      [6]
    2. b)

      Write a short note on limitations and advantages of conventional tubes and solid-state devices.

      [6]
    3. c)

      Draw and explain mode characteristics of single cavity klystron used in laboratory. Explain electronic tuning. 2

      [6]

  4. Q4

    1. a)

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

      Also asked:May 2024 ·May 2023

      [6]
    2. b)

      A reflex klystron operates at the peak mode of n = 2 with beam voltage V0= 300V and beam current I0 = 20mA. If rf signal voltage V 1 = 40 V, then determine the input power, output power and efficiency.

      [6]
    3. c)

      Draw the construction and explain the working of Magnetron.

      [6]

  5. Q5

    1. a)

      Draw and explain V-I characteristics of Gunn diode to justify its amplifying behavior.

      [6]
    2. b)

      Draw the construction and explain working of TRAPATT diode.

      Also asked:Nov 2024 ·May 2024 ·Nov 2023 ·May 2023 ·Nov 2022

      [6]
    3. c)

      Draw the construction and explain working of Varactor Diode.

      Also asked:Nov 2024 ·May 2024 ·Nov 2023 ·May 2023 ·Nov 2022

      [5]

  6. Q6

    1. a)

      Compare IMPATT, TRAPATT and BARITT diode with respect to its operating frequency, working principle, and efficiency.

      [6]
    2. b)

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

      Also asked:Nov 2024

      [6]
    3. c)

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

      Also asked:May 2025 ·Nov 2024

      [5]

  7. Q7

    1. a)

      Explain any two applications of microwaves in detail.

      [5]
    2. b)

      Explain impedance measurement using slotted transmission line.

      Also asked:Nov 2024

      [6]
    3. c)

      Explain the experimental set up to measure SWR and wavelength using slotted transmission line.

      [6]

  8. Q8

    1. a)

      Define SAR, PEL and PET

      [6]
    2. b)

      Explain attenuation measurement using power ratio measurement technique. State drawback of power ratio measurement technique.

      [5]
    3. c)

      Explain any three health hazards due to radiations in details. … … …

      [6]