MICROWAVE ELECTRONICS-I

Paper Code: 
PHY 324 (B)
Credits: 
04
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 
After taking this course the student will be familiar with techniques of generation and propagation of microwaves
 
12.00
Unit 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: 
Resonators,Ferrites

 (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: 
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: 
Magnetrons

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: 
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.

References: 
  1. Electromagnetic Waves & Radiating System-Jorden & Balmain.
  2. Theory and Applications of Microwaves A.B. Brownwell & R.E. Beam (Mc Graw Hill).
  3. Introduction to Microwave Theory by Atwater (McGraw Hill).
  4. Principles of Microwave circuits by G.C. Montogmetry (McGraw Hill).
  5. Microwave Circuits & Passive Devices by M.L. Sisodia adn G.S. Raghuvanshi (Willey Eastern, New Delhi).
  6. Foundations of Microwave Engineering by R.E. Collin (McGraw Hill).
  7. Microwave Semiconductor Devices and their Circuit applications by H.A. Watson.
  8. Microwaves by M.L. Sisodia & Vijay Laxmi Gupta.
  9. Antenna Theory, Part-I by R.E. Collin & F.J. Zucker (McGraw Hill, New York).
  10. Microstrip Antennas by Bahl & Bhartiya (Artech House, Messachausetts).
  11. Antenna Theory Analysis by E.A. Wolff (J.Willey & sons).
  12. Antenna Theory Analysis by C.A. Balanis Harper & Row, Publ. & Inc. New York.
  13. Antenna Theory & Design by R.C. Elliott (LPHI Ltd. New Delhi.). 
Academic Year: 
2015-2016
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