Exam Details
| Subject | microwave engineering | |
| Paper | ||
| Exam / Course | pddc | |
| Department | ||
| Organization | Gujarat Technological University | |
| Position | ||
| Exam Date | November, 2017 | |
| City, State | gujarat, ahmedabad |
Question Paper
1
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-VII EXAMINATION WINTER 2017
Subject Code: X71101 Date:02/11/2017
Subject Name: Microwave Engineering
Time:10:30AM TO 1:00PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1
List down the advantages and applications of Microwave. Explain it.
07
Define phase velocity group velocity guided wavelength return loss VSWR reflection coefficient Characteristic Impedance.
07
Q.2
What is Rectangular Waveguide? Derive the solution of TM mode in Rectangular Waveguide.
07
What is Dominant mode? Which dominant mode propagates in Rectangular waveguide? Why does TEM mode cannot propagate through the rectangular waveguide?
07
OR
What is the importance of impedance matching? Give your answer with respect to transmission line. Derive the expression of the length of short circuit stub for impedance matching on transmission line.
07
Q.3
Explain Microstrip Line. Give the advantages and disadvantages of microstrip line. List down the various losses occurs in Microstrip Line.
07
An air filled rectangular waveguide has dimensions of 6 cm x 4 cm. it propagates a signal at 3 GHz. Compute the cut off frequency, guide wavelength and phase velocity.
07
OR
Q.3
Explain the operation of Magic Tee with its Parameters. Also list some of the applications of Magic Tee.
07
What is the purpose of directional coupler? Define coupling factor, directivity and isolation of directional coupler and write the expression for each.
07
Q.4
Describe the working and construction of a reflex klystron. Explain how velocity and current modulation takes place using Applegate diagram.
07
Explain IMPATT Diode with its construction, working and application.
07
OR
Q.4
Explain the mechanism of oscillation of Magnetron oscillator with the help of suitable diagram and discuss its performance characteristics.
07
Explain Gunn Diode with its applications.
07
Q.5
Explain the basic principle of RADAR. Derive the RADAR range equation.
07
List down and explain with neat diagram the display methods of RADAR systems.
07
OR
Q.5
What is Doppler effect? Draw and explain the block diagram of MTI radar.
07
Explain Tunnel Diode in detail.
07
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-VII EXAMINATION WINTER 2017
Subject Code: X71101 Date:02/11/2017
Subject Name: Microwave Engineering
Time:10:30AM TO 1:00PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1
List down the advantages and applications of Microwave. Explain it.
07
Define phase velocity group velocity guided wavelength return loss VSWR reflection coefficient Characteristic Impedance.
07
Q.2
What is Rectangular Waveguide? Derive the solution of TM mode in Rectangular Waveguide.
07
What is Dominant mode? Which dominant mode propagates in Rectangular waveguide? Why does TEM mode cannot propagate through the rectangular waveguide?
07
OR
What is the importance of impedance matching? Give your answer with respect to transmission line. Derive the expression of the length of short circuit stub for impedance matching on transmission line.
07
Q.3
Explain Microstrip Line. Give the advantages and disadvantages of microstrip line. List down the various losses occurs in Microstrip Line.
07
An air filled rectangular waveguide has dimensions of 6 cm x 4 cm. it propagates a signal at 3 GHz. Compute the cut off frequency, guide wavelength and phase velocity.
07
OR
Q.3
Explain the operation of Magic Tee with its Parameters. Also list some of the applications of Magic Tee.
07
What is the purpose of directional coupler? Define coupling factor, directivity and isolation of directional coupler and write the expression for each.
07
Q.4
Describe the working and construction of a reflex klystron. Explain how velocity and current modulation takes place using Applegate diagram.
07
Explain IMPATT Diode with its construction, working and application.
07
OR
Q.4
Explain the mechanism of oscillation of Magnetron oscillator with the help of suitable diagram and discuss its performance characteristics.
07
Explain Gunn Diode with its applications.
07
Q.5
Explain the basic principle of RADAR. Derive the RADAR range equation.
07
List down and explain with neat diagram the display methods of RADAR systems.
07
OR
Q.5
What is Doppler effect? Draw and explain the block diagram of MTI radar.
07
Explain Tunnel Diode in detail.
07
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