Kannur University 2010-2nd Sem B.Tech Vester Engineering (Regular Including Part Time) , PT 2K6 /2K6 EC 702 : MICROWAVE ENGINEERING - Question Paper

VII Semester B.Tech. Engineering Degree (Regular Including Part Time)
Examination, December 2010
PT 2K6 /2K6 EC 702 : MICROWAVE ENGINEERING

Time: three Hours Max. Marks: 100

Instructions : i) ans all questions
ii) presume missing data suitably.

PART A

1. discuss the bunching process ia a klystron. [Marks 5]

2. discuss circular cavity resonators. [Marks 5]

3. elaborate hybrid rings ? [Marks 5]

4. Deduce the S matrix for a directional coupler. [Marks 5]

5. explain briefly, the Gunn oscillation modes. [Marks 5]

6. Write short note on MESFET. [Marks 5]

7. elaborate periodic structures ? discuss briefly. [Marks 5]

8. Differentiate ranging from filter design by insertion loss method and the identical by
image parameter method. [Marks 5]

PART B

9. What is reflex klystron ? discuss in detail its operation and performance. [Marks 15]

OR

10. explain in detail, the TE modes in rectangular waveguides. Also explain the power
transmission in rectangular waveguides. [Marks 15]

11. define microwave circulators and isolators in detail. [Marks 15]

OR

12. discuss single stub and double stub tuning every with an example. [Marks 15]

13. Show that Ridley-Watkins-Hilsum theory is in agreement with the 1 discussed by
Gunn. [Marks 15]

OR

14 define the physical structure of IMPACT diodes and discuss how their negative
resistance varies with transit angle. Also explain their power output and effeciency. [Marks 15]

15. Write short note on :

a) Richard's transformation [Marks 7]

b) Kuroda's Identities. [Marks 8]

OR

16. explain in detail the term stability wth respect to microwave amplifiers. [Marks 15]

Earning:   Approval pending.