Coming soon
Microwave Electronics-I
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):
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Course |
Learning outcomes (at course level) |
Learning and teaching strategies |
Assessment Strategies |
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PAPER CODE |
Paper Title |
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PHY 324(B)
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Microwave Electronics-I (Theory)
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The students will be able to: CO85: analyse rectangular and circular waveguides and derive the field equations for electric and magnetic fields in them. CO86: learn about waveguide resonators and calculate its Q factor. CO87: understand ferrites and its applications CO88: explain and analyse Klystron and its types, magnetrons and travelling wave tubes. CO89: explain the procedures to measure different parameters like VSWR, Impedance, frequency & attenuation, etc. CO90: develop the concept of Complex permittivity of material and compare different methods of measurement of permittivity. |
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 |
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.
(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 emPSOying Faraday rotation (isolator, Gyrator, Circulator). Introduction to single crystal ferromagnetic resonators, YIG tuned solid state resonators.
Microwave tubes: Space charge spreading of an electron beam, Beam focusing.
Klystrons: Velocity Modulation, Two Cavity Klystron, Reflex Klystron, Efficiency of Klystrons.
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.
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.
1. Foundations of Microwave Engineering by R.E. Collin (McGraw Hill).
2. Microwave Circuits & Passive Devices by M.L. Sisodia adn G.S. Raghuvanshi (Willey Eastern, New Delhi).
3. Microwaves by M.L. Sisodia & Vijay Laxmi Gupta.
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 Semiconductor Devices and their Circuit applications by H.A. Watson.
6. Hand book of microwave measurement Vol-II by M. Sucher & J. Fox (Polytechnic Press, New York).
E- Content:
1. https://nptel.ac.in/courses/108103141
2. https://nptel.ac.in/courses/108101112
