Download GTU B.Tech 2020 Winter 7th Sem 2171001 Microwave Engineering Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2171001 Microwave Engineering Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2171001 Date:19/01/2021
Subject Name:Microwave Engineering
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS
Q.1 (a) Define following :1 ) VSWR 2) Characteristics impedance 3) Phase
03
velocity

(b) Write all properties of Smith chart.
04

(c) Define Standing wave and derive equation of the voltage standing wave.
07
Also find equations for the minimum and maximum amplitude and distance
between any two successive maxima or minima.
Q.2 (a) Discuss the characteristics of TEM, TE and TM Mode.
03

(b) Explain advantages of microwave and its applications.
04

(c) Draw equivalent circuit of transmission line and derive basic equations for
07
voltage and current on transmission line.


Q.3 (a) Draw schematic of four port circulator and explain its working,
03

(b) List the Medical and Civil applications of microwaves.
04

(c) Explain reflex klystron and it's working with all necessary detail.
07


Q.4 (a) Write the limitations and applications of TRAPATT diode.
03

(b) Explain Effect of Microwaves on human body.
04

(c) Explain the operation, construction and application of the IMPATT diode.
07
Q.5 (a) Describe the applications of the parametric amplifier.
03

(b) A transmission line has following parameters R=2/m G=0.5mho/m
04
L=8nH/m C=0.23pF f=1GHz Calculate the characteristic Impedance and
the propagation constant.

(c) Explain the construction of four port circulator and derive its S-matrix.
07

Q.6 (a) Write a note on Directional coupler with all necessary detail.
03

(b) A lossless transmission line with characteristic impedance of 300 ohm is fed
04
by a generator with impedance 100 ohm. The line is 100 m long and is
terminated by a resistive load of 200 ohm. Calculate the load reflection
coefficient, VSWR, the transmission loss and the return loss.

(c) Explain circular waveguide with necessary detail.
07
Q.7 (a) Discuss quality factor for a varactor diode.
03

(b) Explain remote sensing system in detail.
04

(c) Explain Basic Principal of "RADAR" draw and explain the block diagram
07
of RADAR.


Q.8 (a) Explain working of Traveling-wave tube.
03
(b) Explain Microwave Antennas in detail.
04
(c) Explain Electromagnetic Interference and Microwave Imaging.
07
*************
1

---