Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 7th Sem New 2171001 Microwave Engineering Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2017
Subject Code: 2171001 Date: 02/11/2017
Subject Name: Microwave Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Discuss in brief advantages and application of microwave. 03
(b) Define: (1) Characteristic Impedance
(2) VSWR
(3) Reflection coefficient
(4) Transmission coefficient
04
(c) Explain with merits and demerits of micro strip line, Also explain briefly
parallel strip line.
07
Q.2 (a) Explain the impossibilities of TEM wave propagation through waveguide. 03
(b) Sketch circular and rectangular wave guide and compare it. 04
(c) Draw equivalent circuit of transmission line and drive basic equation for
voltage and current on transmission line, Define characteristic impedance of
Tx -line.
07
OR
(c) What is the importance of impedance matching? Explain single stub and
double stub matching in brief.
07
Q-3 (a) Define coupling factor, directivity & isolation factor w.r.s.t directional
coupler.
03
(b) Write all properties of Smith chart. 04
(c) A telephone line has R = 6 ?/km, L = 2.2 mH/km, C = 0.005 ?F/km, and G =
0.05 ?mho/km. Determine Z
0
, ? , ? at 1 KHz. If the line length is 100 km,
determine the attenuation and phase shift of the signal. Calculate the phase
velocity of the signal.
07
OR
Q-3 (a) What is S-Matrix? What are the properties of S-Matrix? 03
(b) Draw schematic of four port circulator and explain its working, 04
(c) Draw and explain E-plane Tee. Derive its S-Matrix. 07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2017
Subject Code: 2171001 Date: 02/11/2017
Subject Name: Microwave Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Discuss in brief advantages and application of microwave. 03
(b) Define: (1) Characteristic Impedance
(2) VSWR
(3) Reflection coefficient
(4) Transmission coefficient
04
(c) Explain with merits and demerits of micro strip line, Also explain briefly
parallel strip line.
07
Q.2 (a) Explain the impossibilities of TEM wave propagation through waveguide. 03
(b) Sketch circular and rectangular wave guide and compare it. 04
(c) Draw equivalent circuit of transmission line and drive basic equation for
voltage and current on transmission line, Define characteristic impedance of
Tx -line.
07
OR
(c) What is the importance of impedance matching? Explain single stub and
double stub matching in brief.
07
Q-3 (a) Define coupling factor, directivity & isolation factor w.r.s.t directional
coupler.
03
(b) Write all properties of Smith chart. 04
(c) A telephone line has R = 6 ?/km, L = 2.2 mH/km, C = 0.005 ?F/km, and G =
0.05 ?mho/km. Determine Z
0
, ? , ? at 1 KHz. If the line length is 100 km,
determine the attenuation and phase shift of the signal. Calculate the phase
velocity of the signal.
07
OR
Q-3 (a) What is S-Matrix? What are the properties of S-Matrix? 03
(b) Draw schematic of four port circulator and explain its working, 04
(c) Draw and explain E-plane Tee. Derive its S-Matrix. 07
2
Q-4 (a) What is MMIC? Which materials are used for MMIC fabrication? 03
(b) Write a short note on Two Cavity Klystron. 04
(c) Explain construction, characteristic and application of Gunn diode. 07
OR
Q-4 (a) Write notes on Medical and Civil related application of microwave. 03
(b) Describe the working of a reflex klystron. 04
(c) Explain working of TRAPATT diode. Write its limitations and applications. 07
Q-5 (a) What are the problems associated to conventional tubes at microwave
frequencies?
03
(b) Explain Brief notes on any one Microwave Antenna. 04
(c) Explain briefly different method of Impedance measurement at microwave
frequency.
07
OR
Q-5 (a) Brief note on microwave satellite system. 03
(b) Write notes on Remote Sensing system. 04
(c) Explain Network Analyzer and how different scattering parameters are
measured?
07
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This post was last modified on 20 February 2020