Download GTU BE/B.Tech 2017 Winter 7th Sem New 2171001 Microwave Engineering Question Paper

FirstRanker.com
Firstranker's choice Seat No.: Enrolment No.

GUJARAT TECHNOLOGICAL UNIVERSITY

--- Content provided by FirstRanker.com ---

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:

--- Content provided by FirstRanker.com ---

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 04

--- Content provided by FirstRanker.com ---

(2) VSWR
(3) Reflection coefficient
(4) Transmission coefficient
(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

--- Content provided by FirstRanker.com ---

(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

--- Content provided by FirstRanker.com ---

(b) Write all properties of Smith chart. 04
(c) A telephone line has R =6 (/km, L =2.2 mH/km, C=0.005 pF/km,and G= 0.05 pmho/km. Determine Zy , o, 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

--- Content provided by FirstRanker.com ---

(c) Draw and explain E-plane Tee. Derive its S-Matrix. 07

Q-5 (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

--- Content provided by FirstRanker.com ---

Q-5 (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

--- Content provided by FirstRanker.com ---

(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

--- Content provided by FirstRanker.com ---