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Total No. of Questions : 8
[Total No. of Printed Pages : 2
[2]
Roll No .......................................
MEVD-302(A)
M.E./M.Tech. III Semester
Examination, November 2023
Communication RF IC Design
(Elective-II)
Time : Three Hours
Maximum Marks : 70
Note : i) Attempt any five questions.
ii) All questions carry equal marks.
1.
a)
Explain in detail about the architecture of Radio Frequency system. (7)
b)
Explain the basis for construction of Smith chart. Illustrate as to how it can be used of an Admittance chart. (7)
2.
a)
Discuss about the error performance of various modulation techniques in fading channels. (7)
b)
Give details about the causes for inter symbol interference. How can ISI be eliminated. (7)
3.
a)
Discuss about classes of operation of RF amplifiers and explain how biasing should be done to implement each class of operation. (7)
b)
Draw neat circuit diagrams to explain how gain-bandwidth product limitation can be overcome in an RF broadband amplifier design. (7)
4.
a)
With the help of neat schematics explain how oscillators should be configured to obtain high frequencies of oscillation. State the principle of operation of a dielectric resonator oscillator. (7)
b)
Enumerate the importance of 'power relations' in the design of an amplifier at high frequencies. (7)
5.
a)
Draw the block diagram of GSM radio architecture and explain in brief. (7)
b)
Discuss the behavior of LNA topologies with its design constraints. (7)
6.
a)
Explain in detail about linearized PLL models. (7)
b)
How cross-field is used to generate oscillations in Magnetron and derive the Hull cut-off condition? (7)
7.
a)
Discuss about integer-N synthesis and fractional frequency synthesis. (7)
b)
Design and explain any two multiplier-based mixers with suitable examples. (7)
8.
Write a short note on any three of the following. (5+5+4)
a)
Single Chip Radio Concept
b)
Mixer circuit
c)
Gain compression
d)
S-parameter model