B.E-B.E Electronics and Communication Engineering Transmission Lines and Wave Guides(Sathyabama University, Chennai, Tamil Nadu-2011)
Monday, 19 August 2013 07:32Duraimani
(Established under section 3 of UGC Act,1956)
Course & Branch :B.E - P-ECE Max. Marks:80
Title of the Paper :Transmission Lines and Wave Guides
Sub. Code :SECX1006 (2010-2011) Time : 3 Hours
Date :10/11/2011 Session :AN
PART - A (10 x 2 = 20)
Answer ALL the Questions
1. Define propagation constant of a transmission line.
2. Mention various types of loading.
3. What are the constants for the line of zero dissipation?
4. What are microstripliner?
5. Design a quarter wave transformer to match a load of 200Ω to a source resistance 500Ω.the operating frequency is 200MHz.
6. Distinguish between single stub matching and double stub matching.
7. Define wave impendence.
8. What is the condition for velocity of propagation?
9. Write about impossibility of TEM wave is wave guide.
10. Mention the dominant modes in rectangular and circular wave guide.
PART – B (5 x 12 = 60)
Answer All the Questions
11. Derive the conditions for general transmission line equations.
(or)
12. Discuss is detail about open and short circuited line under various load conditions.
13. Parallel wire tx’n line is having following line parameters at 5KHz.series resistance R=2.59X10-3 Ω /m series inductance L = 2µh/m,shunt conductance ġ=0Ω/m, Capacitance=5.56PF/m,find the characteristics impedance, attenuation constant, Phase constant, velocity of propagation and wavelength.
(or)
14. Deduce the condition for SWR and also input impendence is terms of reflection coefficient.
15. A 75Ω lossless TX’n line is to be matched with a (100 – j80)Ω load using single stub .Calculate the stub length and its distance from load corresponding to frequency Of 30MHz using smith chart
(or)
16. Discuss is detail about measurement of VSWR wavelength and impendence.
17. Derive the component of E and H field strength between pair of parallel perfectly conducting planes.
(or)
18. Derive the condition for attenuation in parallel plane wave
19. A TE10wave at 10GHz propagation in x – band copper rectangle wave guide whose inner dimensions are a = 2.3cm, b = 1cm which is filled with Teflon Єr = 2.1 / µr = 1 Calculate cut off frequency velocity of propagation phase constant, wave impendence guide wavelength.
(or)
20. Derive the expression for TM wave components in circular waveguide using Bessel function.
| Earning: ₹ 4.45/- |
