Download GTU BE/B.Tech 2019 Winter 7th Sem Old 171001 Microwave Engineering Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 7th Sem Old 171001 Microwave Engineering Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VII (Old) EXAMINATION ? WINTER 2019
Subject Code: 171001 Date: 05/12/2019

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 the advantages of microwave frequencies compare with low-frequency
waves and list out the various applications of microwaves.
07
(b) Draw and explain equivalent circuit of a length ?x of a transmission line at
microwave frequencies.
07

Q.2 (a) Describe the ?Reflex Klystron? with the aid of suitable schematic diagram. Why
the Transit Time is so important in this device.
07
(b) Write the advantages and disadvantages of rectangular waveguide over circular
wave guide .List out the differences between the TE mode and TM mode.
07
OR
(b) A transmission line has a characteristic impedance of 50 + j 0.01 ? and is
terminated in a load impedance of 73 ? j 42.5 ?. Calculate: (a) the reflection
coefficient; (b) the standing-wave ratio.
07

Q.3 (a) What do you mean by stub? Explain impedance matching by use of stub with
necessary circuit, waveforms and derivation.
07
(b) With neat sketch, explain the operation of Magnetron. 07
OR
Q.3 (a) What is magic associated with a Magic Tee ?Draw a neat sketch of a Magic Tee
and list out its applications and properties
07
(b) Explain construction, characteristic and application of Gunn diode. 07

Q.4 (a) Write a note on Directional coupler and its applications. Explain the terms
Coupling factor and Directivity.
07
(b) What is Tunneling effect? Explain the construction and working of Tunnel diode.
What are the applications of Tunnel diode?
07
OR
Q.4 (a) Explain the construction and working of IMPATT diode. What are its applications? 07
(b) With neat sketch, explain the operation of ?Traveling Wave Tube?. 07

Q.5 (a) What do you mean by Doppler effect? Explain operation of MTI radar. 07
(b) Explain Basic Principal of ?RADAR? and Derive the basic RADAR Range
Equations
07
OR
Q.5 (a) Describe Microstrip line in detail. 07
(b) Explain ?Farday Rotation Circulator? and ?Y Circulator? with neat sketch 07

*************
FirstRanker.com - FirstRanker's Choice