Download GTU BE/B.Tech 2018 Winter 7th Sem New 2171001 Microwave Engineering Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem New 2171001 Microwave Engineering Previous Question Paper

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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2171001 Date: 15/11/2018

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.

MARKS

Q.1 (a) List all microwave bands and explain most important advantage of
Microwave Communication.
03
(b) Why TEM mode is not possible in Rectangular Wave guide? 04
(c) Derive an Equation of Z(l) of transmission line. 07

Q.2 (a) Define following terms:
(a)Return loss (b) Propagation Constant (c) VSWR
03
(b) Derive an equation of Vp and Vg and from that deduce the relation
between them.
04
(c) Derive field components in the wave guide for TM Mode 07
OR
(c) For given wave guide dimensions, Identify the bands and find cut off
frequencies 165.1 mm ? 82.55 mm and 22.9 mm? 10.2mm.
07
Q.3 (a) What do you mean by S parameter? Why it is be used for analysis of
Microwave networks?
03
(b) How the microwave power can be taped from the wave guide for
coupling using directional coupler.
04
(c) Using S parameter explain properties of magic tee. 07
OR
Q.3 (a) Explain about medical application of microwave engineering. 03
(b) Explain the working of an Isolator. 04
(c) Explain about Microwave power measurement methods. 07
Q.4 (a) Explain in brief method of ?g guide wavelength measurement. 03
(b) Find out Zin at the input of ?/4 long transmission line. 04
(c) Explain in detail working of Gunn diode. 07
OR
Q.4 (a) Explain the effects of microwave on human body. 03
(b) Explain the working of two cavity klystron Amplifier. 04
(c) Explain in detail working of IMPATT diode. 07
Q.5 (a) Explain in brief how to measure microwave frequency? 03
(b) Explain the working of TWTA amplifiers. 04
(c) With necessary equation explain the working of a parametric
amplifier
07
OR

Q.5 (a) Explain in brief microwave imaging. 03
(b) Explain the working of Magnetron. 04
(c) Explain the working of RADAR. 07

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