14-07-2012, 01:39 PM
MICROWAVE DEVICES AND CIRCUITS
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Introduction to microwave communications
Microwave Spectrum and Bands, Limitations of conventional circuit theory concepts at microwave frequencies
Applications of Microwaves.
Generation and amplification of microwaves
Limitations of conventional vacuum tubes at microwave frequencies
Two cavity klystron amplifiers and Reflex Klystron oscillators: Construction , process of velocity modulation and bunching, Applegate diagram, o/p Power and Efficiency, applications
Cylindrical magnetron: Construction and working principle, Hull cut off magnetic equation and Hull cut off voltage equation, Cyclotron angular frequency, applications
Traveling wave tube: Construction and working principle, applications
Numerical examples based on the above topics
Wave guide components and analysis
Definition and significance of s-parameters, properties of s-parameters,
Construction , working principle and s- matrix representation of the following microwave components:
Cavity resonators,Waveguide Attenuators, Waveguide Phase Shifters ,Waveguide Multiport Junctions, E plane and H plane Tees, Magic Tee, Hybrid Ring, Directional Couplers.
Microwave Ferrite components Faraday Rotation Isolator, Gyrator, Circulator.
Numerical examples based on the above topics
Theory Examination:
1. Question paper will comprise of total 7 questions, each of 20 marks.
2. Only 5 questions need to be solved.
3. Question number 1 will be compulsory and will cover all modules.
4. Remaining questions will be from the same module or mixed in nature. (e.g.-
suppose Q.2 has part (a) from, module 3 then part (b) will be from any
module other than module 3.)
5. In the question paper, weightage of each module will be proportional to
number of respective lecture hours as mentioned in the syllabus.
6. No question should be asked from pre-requisite module
.