August
V63/T04063/EE/20150816
2015
Advance Communication System
Instructions:
Marks-80
Time: 3 Hrs
1. All questions are compulsory.
2. “Long Answer type Question (LAQ)” is a supply type
question of 15 marks which required a typical answer of about
60-80 lines in bout 32-40 minutes.
3. “Sort Answer type Question (SAQ)” is a supply type question
of 5 marks which required a typical answer of about 15-20 lines
in bout 08-10 minutes.
4. Figures to the right indicate marks allotted to the questions.
5. Assume suitable data if necessary
6. Use a nonprogrammable type of scientific calculator is
allowed
Marks
SECTION-A
Q.1 A rectangular air filled copper wave guide with dimension 0.9 inch
*0.4 inch cross section and 12"length is operated at 9.2 GHz with a
dominant mode. Find
a) cut-off frequency
b) Guide wavelength and
c) PHASE velocity.
15
OR
Q.1 Define Cut-off frequency .State its importance in waveguide.
15
Q.2 Explain uplink and downlink frequency bands used in satellite
communication
OR
15
Q.2 Explain Rader Bacons and State its equation, significance
15
Q.3 Define i) Elevation angle. ii) Azimuth angle
5
Q.4 Write a note on microwave components.
5
SECTION-B
Q.5 Illustrate in detail any two applications of optic fiber
communication.
OR
15
Q.5 Calculate the NA of a fiber with core index n1=1.61 and cladding
index n2=1.55
15
Q.6 State and explain Rayleigh scattering.
15
OR
Q.6 Describe attenuation in fiber optic and explain its types.
15
Q.7 What is Refraction? Explain with the help of diagram.
5
Q.8 Wite a note on Ray theory.
5
Computer Generated Random Question Paper dated: 07-07-2015 16:02:17
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