Download JNTUA B.Tech 4-2 R13 2018 July Supple AS 9A04606 Microwave Engineering Question Paper

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Code: 9A04606

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B.Tech IV Year II Semester (R09) Supplementary Examinations July 2018

MICROWAVE ENGINEERING

(Electronics & Communication Engineering)

(For 2009 (LC), 2010, 2011, 2012 regular & 2011 (LC), 2012, 2013 lateral admitted batches only)

Time: 3 hours

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Max. Marks: 70

Answer any FIVE questions

All questions carry equal marks

1. (a) Draw the field patterns of TE11, TE21, TM11 and TM21 modes in rectangular waveguide. Justify why TE10 is dominant mode in rectangular waveguide.
   (b) State the factors upon which the attenuations constant of a parallel strip line are dependent.

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2. (a) Derive an expression for the attenuation factor of a micro strip line.
   (b) Explain the construction and working of two choke type movable short circuit used in microwave circuits.
3. (a) Write short note on tuning screws and ports.
   (b) Write the properties of scattering matrix.
4. (a) Obtain scattering matrix of E-plane Tee junction.
   

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   (b) What do you mean by O-type tubes? Explain difference between O-type and M-type tubes.
5. (a) Derive the expression for the distance between cavities of klystron for maximum bunching.
   (b) What is BWO? Explain its operation with a neat sketch.
6. (a) Discuss about the performance characteristics and applications of BWO.
   (b) Draw the schematic diagram of an n-type GaAs diode and explain its operation.

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7. (a) Derive the criterion for classifying the modes of operation for Gunn effect diodes.
   (b) What is spectrum analyzer? List the types of spectrum analyzer. List some application of spectrum analyzer.
8. (a) Describe a microwave bench.
   (b)

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