Vinayaka Missions University 2007 B.E Electrical and Electronics Engineering 08: (ECE): M ICROWAVE ENGINEERING - Question Paper

B.E. DEGREE exam JULY 08
B.E. (ECE)
M ICROWAVE ENGINEERING

Time: three Hrs. Max. Marks: 75

part – A

ans all the questions: 10 x two = 20

1. List the properties of ‘S’ parameter.
2. State the relation ranging from Y parameter and ABCD parameter.
3. elaborate coupling loops? Where it is used?
4. Draw a) E plane tee b) H plane tee.
5. Why do you mean by bunching and de bunching in reflex
klystron?
6. Draw the equivalent circuit of reflex klystron.
7. describe conversion loss in dB.
8. What is harmonic mixer?
9. elaborate the applications of IMPATT diodes?
10. What is VSWR? How it is measured in microwave frequency.

part – B

ans any 5 Questions: five x five = 25

discuss the experimental set up for measurement of antenna gain by
two various methods.
11. Differentiate band width and beam width of antenna.
12. Prove that impedance and admittance matrices are
symmetrical for a reciprocal junction.
13. Differentiate bandwidth and beam width of antenna.
14. Write a short note o Circulators.
15. discuss all the properties of ‘S’ parameters.
16. discuss the various methods of antenna gain
measurements.
17. discuss the impedance measurement by slotted line method
and reactive discontinuity method.

part – C

ans any 2 Questions: two x 15 = 30
18. discuss the frequency measurement using wave meter
method, down conversion method.
19. Derive all necessary relation ships ranging from S, Y, Z and
ABCD parameters.
20. discuss the operation of reflex klystron. Derive suitable
expressions for power diodes.

Earning:   Approval pending.