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

to Ro.
8. Draw the Standing Wave trend for a line which is terminated with i)open and ii)
short circuit termination.
9.Define Standing Wave Ratio.
10.Write the Input Impedance formula for a dissipationless line.
11.Write the minimum & maximum value of Impedance of a zero dissipation line.
12.Write the Input Impedance formula for a zero dissipation line with i) open and ii)
short circuit termination.
13.Draw the variation of Impedance of dissipationless line as a function of length for
a line with Short circuit termination.
14.Draw the variation of Impedance of dissipationless line as a function of length for
a line with Open circuit termination.
15.Write the Power formula for a dissipationless line.
16.Draw the graph showing Relationship ranging from Reflection Coefficient and
Standing Wave Ratio.
17. If the load Impedance is 54-j74 ohms and Zo=150 ohms, obtain the Standing
Wave Ratio.
18. A HF line has subsequent primary constants L=1.2mH/km, C=0.05microFarad/km.
Determine Zo and ?.
19. A Lossless line having Zo-50 ohms and terminated in a load ZR is fed with
500mW generator power. VSWR on the line is 1.4. compute maximam and
minimum values of voltages along the line.
20. provide the relation ranging from VSWR and Reflection Coefficient.
21. If the VSWR of a particular Transmission line is 2.5, then compute the magnitude
of the reflection coefficient.
22. VSWR in a transmission line lies ranging from ___________ and ___________
23. Reflection Coefficient in a transmission line lies ranging from ___________ and ___________

PART-B
1. a) discuss about Zero Dissipation Line and derive the equations for characteristics impedance,
propagation constant and velocity of propagation.
b) Derive the expressions for voltage and Current at any point on a line at Radio Frequency
terminated in ZR.
2. discuss about Standing Waves .Draw the Standing wave trend for i) Open circuit load, ii) Short
Circuit Load and iii) Matched Load.
3. discuss the method of Power and Impedance measurement on a zero dissipation Line.
4. discuss how Standing Wave Ratio and Wavelength can be measured in a transmission line.
5. An UHF Transmission line of Zo=75/_0 ohms is terminated in an unknown load. The VSWR

Earning:   Approval pending.