Anna University, Chennai Nov/Dec 2012 Examinations

Rejinpaul.com Important Questions

Transmission Lines and Wave Guides EC2305

Common To V Sem ECE

Unit I-V

1.
Design
a constant K T-section band elimination filter with cutoff frequencies of 2 khz
and 5 khz. The design impedance is 900 ohms

2.
Derive and draw the characteristics of m-derived T
section for high pass filter.

3.
Design a T section and Ï€ section constant k high
pass filter having cut off frequency of 12 khz and nominal impedance R =
500ohms. Also find i) Zo ii)Î² at 24 Khz iii) Î± at 4Khz

4.
Design prototype T section band pass filter having
cut-off frequency of 1 khz and 4khz and impedance of 600 ohms. Find resonant
frequency.

5.
Draw
and explain the operation of crystal filter

6.
What
is Waveform distortion? Explain its types with equations. Derive the condition
for a distortion less line?

7.
At
8 Mhz the characteristic Impedance is 40-j2 ohms and propagation constant 0.01+j0.18
per meter. Find the primary constants

8.
Derive
the two Standard forms for Voltage and Current of a line terminated by an
impedance of the transmission line.

9.
A
transmission line has the following parameters per km. R=15 ohms, C=15 uf,
L=1mH and G=1 umho. Find the additional inductance to give distortionless transmission.
Calculate attenuation and phase constant for the loaded line

10.What is lumped
loading? Derive an expression for the lumped loaded cable

11.
Explain
single stub matching on a transmission line and derive an expression to find the
length & location of the stub used for matching on a line?

12.Deduce the
expression for constant S circle for the dissipation line

13.
Derive
the expression for the input impedance of the dissipationless line and expression
for a quarter wave line with its applications

14.Derive the
expression that permit easy measurements of power flow on a line of negligible
losses.

15.
What is SWR? Derive an expression for it related
with reflection Coefficient

16.Derive the
expression for the field strength for
the TM and TEwaves between parallel plates
propagating in z direction

17.
Derive
the characteristics of TE, TM and TEM waves for parallel plates

18.A Waveguide formed
by two parallel copper sheets Ïƒ=5.8*10^{7} s/m separated by a 5 cm thick
lossy dielectric Îµr=2.25, Î¼r=1, Ïƒ=10^{-10}s/m. For an operating
frequency of 10 Ghz, find Î², Î±_{d}, Î±_{v}, V_{g}, V_{p}
& Î»_{g} for TE_{1}, TM_{2} and TEM modes

19.Using Bessel
function derive the TE wave components in circular waveguide

20.
Explain
the transmission of TM waves in Rectangular wavguide with necessary expressions
and diagrams for the field components

21.Determine the
solution of electric and magnetic fields of TM waves guided along rectangular waveguide

22.
Explain
the various excitation methods of Rectangular waveguides.