Microwave Engineering | B.E. Semester VII Winter 2018 | GTU Papers

Q: Q1. Define following : (i) Guide wave length (ii) Transmission coefficient (iii) Phase velocity (iv) Gunn effect (v) VSWR (vi) Return loss (vii) Characteristic impedance

This is question 1 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Q: Q1. Describe the problems associated with conventional tubes at UHF and Microwave?

This is question 1 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Q: Q2. Explain reflection coefficient of transmission line and standing wave. Derive expression for impedance and reflection coefficient at any point on the line.

This is question 2 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Q: Q2. Alossless line has a characteristic impedance of 50 11 and is terminated in a load resistance of 75 n. The line is energized by a generator which has an output impedance of 50 n and an open-circuit output voltage of 30 V (rms). The line is assumed to be 2.25 wavelengths long. Determine: a. The input impedance b. The magnitude of the instantaneous load voltage c. The instantaneous power delivered to the load

This is question 2 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Q: Q2. Explain TE , TM and TEM modes in a waveguide. What is meant by the Dominant mode in a rectangular waveguide? Explain why TEM mode can’t propagate through a rectangular waveguide.

This is question 2 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Q: Q3. List different types of Magnetron. Explain mechanism of oscillations of Magnetron Oscillator with diagram.

This is question 3 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Q: Q3. Explain working of two cavity klystron with necessary diagram and waveforms.

This is question 3 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Q: Q3. Explain the construction and working of IMPATT diode. What are its applications?

This is question 3 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Q: Q3. With the aid of Diagram, explain the operation of “ Two Hole Directional Coupler”

This is question 3 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Q: Q4. Write properties of smith chart and explain its application with any one example.

This is question 4 (7 marks) from the GTU Microwave Engineering BE Winter 2018 question paper. Subject code: 171001.

Questions17

Define following : (i) Guide wave length (ii) Transmission coefficient (iii) Phase velocity (iv) Gunn effect (v) VSWR (vi) Return loss (vii) Characteristic impedance

[7 marks]

Describe the problems associated with conventional tubes at UHF and Microwave?

[7 marks]

Explain reflection coefficient of transmission line and standing wave. Derive expression for impedance and reflection coefficient at any point on the line.

[7 marks]

Alossless line has a characteristic impedance of 50 11 and is terminated in a load resistance of 75 n. The line is energized by a generator which has an output impedance of 50 n and an open-circuit output voltage of 30 V (rms). The line is assumed to be 2.25 wavelengths long. Determine: a. The input impedance b. The magnitude of the instantaneous load voltage c. The instantaneous power delivered to the load

[7 marks]

Explain TE , TM and TEM modes in a waveguide. What is meant by the Dominant mode in a rectangular waveguide? Explain why TEM mode can’t propagate through a rectangular waveguide.

[7 marks]

List different types of Magnetron. Explain mechanism of oscillations of Magnetron Oscillator with diagram.

[7 marks]

Explain working of two cavity klystron with necessary diagram and waveforms.

[7 marks]

Explain the construction and working of IMPATT diode. What are its applications?

[7 marks]

With the aid of Diagram, explain the operation of “ Two Hole Directional Coupler”

[7 marks]

Write properties of smith chart and explain its application with any one example.

[7 marks]

Explain in detail E-plane Tee. With S-matrix prove that the Tee junction cannot be matched to all the three arms simultaneously.

[7 marks]

What is microstrip line? Derive equation of characteristic impedance and quality factor of microstrip line.

[7 marks]

Explain different display methods of RADAR.

[7 marks]

Explain the principle of MTI radar with block diagram.

[7 marks]

Define Microwave. Write advantage, disadvantage and industrial application of microwave.

[7 marks]

Write short note on Circulators and isolators

[7 marks]

Write a note on any one of the following. (1) Step Recovery Diode and its applications. (2) λ/4 Line and its applications.

[7 marks]

Microwave Engineering — Winter 2018

Questions17

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