MICROWAVE ELECTRONICS-I

Paper Code: 
PHY 324 (B)
Credits: 
4
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

This course will enable the students to –

  1. To make students learn about basics of microwaves, wave guides and field equations.
  2. To familiarize the students  with techniques of generation and propagation of microwaves.
  3. To acquaint the students with microwave measurement techniques.

 

Course outcomes (COs):

                     Course

Learning outcome (at course level)

Learning and teaching strategies

Assessment Strategies

Paper Code

Paper Title

PHY 324(B)

Microwave Electronics-I

 (Theory)

 

The students will be able to –

CO 105: Have knowledge of rectangular and circular  waveguides and derive the field equations for electric and magnetic fields in them.

CO 106: Learn about waveguide resonators and  calculate its Q factor.

CO 107: Have an introduction to ferrites and its applications

CO 108: Explain and analyse Klystron and its types , magnetrons and travelling wave tubes.

CO 109: Know about the concept  and  procedure to measure different parameters like VSWR, Impedance , frequency & attenuation ,etc.

CO 110: Have a concept of Complex permittivity of material and  its measurement

 

Approach in teaching:

Interactive Lectures, Discussion, Tutorials, , Demonstration, Problem Solving

 

 

 

 

 

 

Learning activities for the students:

Self learning assignments, Effective questions,  Seminar presentation, Solving numerical.

Additional learning through online videos and MOOC courses

Class test, Semester end examinations, Quiz, Solving problems, Assignments, Presentations

 

12.00
Unit I: 
I
Introduction to microwaves and its frequency spectrum, Application of microwaves. 
(a) Rectangular wave guide : Wave equation & its solutions, TE & TM modes. Dominant mode and choice of wave guide dimensions, methods of excitation of waveguides.(b) Circular wave guide : wave equation & it solutions, TE, TM & TEM modes. 
(c) Attenuation - Cause of attenuation in wave guides, wall current. & derivation of attenuation constant, Q of the wave guide. 
                                                                   
 
13.00
Unit II: 
II
(a) Resonators: Resonant Modes of rectangular and cylindrical cavity resonators, Q of the cavity resonators, Excitation techniques, Introduction to Mircostrip and Dielectric resonators, Frequency meter. 
(b) Ferrites: Microwave propagation in ferrites, Faraday rotation, Devices employing Faraday rotation (isolator, Gyrator, Circulator). Introduction to single crystal ferromagnetic resonators, YIG tuned solid state resonators. 
                                                                
11.00
Unit III: 
III
Microwave tubes: Space charge spreading of an electron beam, Beam focusing. 
Klystrons: Velocity Modulation, Two Cavity Klystron, Reflex Klystron, Efficiency of Klystrons. 
                                              
12.00
Unit IV: 
IV
Magnetrons: Types & description, theoretical relations between Electric & Magnetic field of oscillations, Modes of oscillations & operating characteristics, 
Traveling wave tubes: O & M type traveling wave tubes. Gyrotrons: Constructions of different Gyrotrons, Field - Particle Interaction in Gyrotron. 
 
 
                                                                 
12.00
Unit V: 
V
Microwave Measurement : Microwave Detectors , Power, Frequency, Attenuation, Impedance using smith chart, VSWR, Reflectometer, Directivity Coupling using direction coupler. 
(b) Complex permittivity of material & its measurement: definition of complex permittivity, determination of permittivity of solids, liquids and powders using shift in minima method.
 
 
 
 
 

BOOKS RECOMMENDED:

  • Electromagnetic Waves & Radiating System-Jorden & Balmain.
  • Theory and Applications of Microwaves A.B. Brownwell & R.E. Beam (Mc Graw Hill).
  • Introduction to Microwave Theory by Atwater (McGraw Hill).
  • Principles of Microwave circuits by G.C. Montogmetry (McGraw Hill).
  • Microwave Circuits & Passive Devices by M.L. Sisodia adn G.S. Raghuvanshi (Willey Eastern, New Delhi).
  • Foundations of Microwave Engineering by R.E. Collin (McGraw Hill).
  • Microwave Semiconductor Devices and their Circuit applications by H.A. Watson.
  • Microwaves by M.L. Sisodia & Vijay Laxmi Gupta.
  • Antenna Theory, Part-I by R.E. Collin & F.J. Zucker (McGraw Hill, New York).
  • Microstrip Antennas by Bahl & Bhartiya (Artech House, Messachausetts).
  • Antenna Theory Analysis by E.A. Wolff (J.Willey & sons).
  • Antenna Theory Analysis by C.A. Balanis Harper & Row, Publ. & Inc. New York.
  • Antenna Theory & Design by R.C. Elliott (LPHI Ltd. New Delhi.).

 

Academic Year: 
2020-2021
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