SRM University 2007 B.Tech Electronics and Communications Engineering BANK : TRANSMSSION LINES AND WAVES GUIDES - Question Paper

EC206 – TRANMISSION LINES AND WAVEGUIDES

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S.R.M. INSTITUTE OF SCIENCE AND TECHNOLOGY
(Deemed University)
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EC206 - TRANSMISSION LINES AND WAVE GUIDES

UNIT-I - TRANSMISSION LINE THEORY

PART-A
1. describe transmission line.
2. elaborate the various kinds of transmission lines?
3. Draw the equivalent circuit of transmission line.
4. elaborate the primary constants of transmission lines?
5. elaborate the secondary constants of transmission line?
6. describe Characteristic Impedance.
7. describe Propagation Constant.
8. Write Characteristic Impedance and Propagation Constant interms of Primary Constants of line.
9. describe Infinite Line.
10. Write the General Line formula of a transmission line.
11. describe open circuit and short circuited line.
12. Mention the significance of characteristics impedance.
13. Write Input Impedance of open and short circuit line.
14. Why Reflection occurs in Transmission lines?
15. describe Reflection loss.
16. describe Reflection Coefficient .
17.Define Reflection Factor.
18.Define Phase velocity.
19.Define Waveform Distortion and mention its kinds.
20. describe Frequency Distortion.
21. describe Phase or Delay Distortion.
22. describe Attenuation and Phase Constant with formula.
23. What is the condition for Distortionless line.
24. What is smooth line?
25. describe Efficiency of Transmission.
26. describe Loading and the cause for Inductive Loading.
27. What is meant by Continuous Loading?
28. What is meant by Lumped Loading?
29. What is Transfer Impedance and write its formula.
30. Write the relation ranging from Zo, Zoc & Zsc.
31. Write the Campbell’s formula.
32. An Open wire Telephone Line has R=10 ohms/Km, L=0.0037H/Km, C=0.0083 micro Farad/Km and G=0.4 micro mhos/Km. Determine Zo at 1000Hz.
33. If Zoc=710/_50 ohms , Zsc=300/_80 ohms. obtain Zo.
34. A 100 Km long Transmission Line is terminated by a resistance of 200 ohms. Zo=600 ohms, a=0.01 neper/Km, ß= 0.03 rad/km. obtain the reflection Coefficient.

PART-B
1. Derive the General Line formula of a Transmission Line.
2.a) discuss various kinds of Loading
b) obtain the sending end impedance of line having negligible losses, where Zo is 55
ohms and receiving end impedance 155+j75 ohms and line is 1.183 times the
Wavelength.
3. discuss the cause for reflection and derive an formula for Reflection Coefficient.

Earning:   Approval pending.