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Microwave Engineering Notes (MWE)

MICROWAVE ENGINEERING Notes

Lecture_Notes – Microwaves – Microwave engineering Notes – MWE Pdf Notes – MWE Notes

Material 1 – Download MWE 1

Material 2 – Download MWE 2

 

Unit-l

Microwave Transmission Lines – I: Introduction, Microwave Spectrum and Bands, Applications of Microwaves. Rectangular Waveguides – Solution of Wave Equations in Rectangular Coordinates. TE/TM mode analysis. Expressions for Fields. Characteristic Equation and Cut-off Frequencies, Filter Characteristics, Dominant and Degenerate Modes, Sketches of TE and TM mode fields in the cross-section, Mode Characteristics – Phase and Group Velocities. Wavelengths and Impedance Relations, Illustrative Problems.

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UNIT II

Microwave Transmission Lines – ll: Rectangular Guides – Power Transmission and Power Losses. Impossibility of TEM Mode, Micro strip Lines- Introduction. Z0 Relations. Effective Dielectric Constant, Losses. Q factor Cavity Resonators— Introduction. Rectangular Cavities. Dominant Modes and Resonant Frequencies. Q factor and Coupling Coefficients. Illustrative Problems

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Unit lll

Waveguide Components And Applications – l: Coupling Mechanisms – Probe, Loop, Aperture types. Waveguide Discontinuities – Waveguide Windows, Tuning Screws and Posts. Matched Loads. Waveguide Attenuators – Different Types, Resistive Card and Rotary Vane Attenuators: Waveguide Phase Shifters — Types, Dielectric and Rotary Vane Phase Shifters, Waveguide Multiport Junctions — E plane and H plane Tees, Magic Tee. Directional Couplers – 2 Hole. Bethe Hole types. Illustrative Problems.

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Unit IV

Waveguide Components And Applications – II: Ferriles» Composition and Characteristics. Faraday Rotation: Ferrite Components — Gyratot, Isolator, Circulator. Scattering Matrix- Significance, Formulation and Properties, S Matrix Calculations for – 2 port Junctions, E plane and H plane Tees. Magic Tee. Circulator and isolator. Illustrative Problems.

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Unit V

Microwave Tubes — l: Limitations and Losses of conventional tubes at microwave frequencies. Microwave tubes – 0 type and M type classifications. O-type tubes : 2 Cavity Klystrons – Structure, Reentrant Cavities. Velocity Modulation Process and Applegate Diagram, Bunching Process and Small Signal Theory – Expressions for o/p Power and Efficiency. Reflex Klystrons — Structure, Velocity Modulation and Applegate Diagram. Mathematical Theory of Buncliing, Power Output, Efficiency. Oscillating Modes and 0/p Characteristics, Effect of Repeller Voltage on Power O/p. Illustrative Problems.

 

Unit VI

Helix TWTs: Significance, Types and Characteristics of Slow Wave Structures; Structure of TWT and Amplification Process (qualitative treatment). Suppression of Oscillations. Gain Considerations.

M-TypeTubes: introduction, Cross-field effects, Magnetrons – Different Types. Cylindrical Traveling Wave Magnetron – Hull Cut-off and Hartree Conditions, Modes of Resonance and Pl-Mode Operation, Separation of PI-Mode. o/p characteristics. Illustrative Problems.

 

Unit VII

Microwave Solid State Devices: Introduction. Classification. Applications. TEDs — Introduction, Gunn Diodes — Principle, RWT-I Theory, Characteristics, Basic Modes of Operation – Gunn Oscillation Modes. LSA Mode, Introduction to Avalanche Transit Time Devices.

 

Unit VllI

Microwave Measurements: Description of Microwave Bench – Different Blocks and their Features, Errors and Precautions; Microwave Power Measurement – Bolorneters. Measurement of Attenuation. Frequency Standing Wave Measurements — Measurement of Low and High VSWR, Cavity Q. Impedance Measurements

Note :- These notes are according to the r09 Syllabus book of JNTUH.In R13 ,8-units of R09 syllabus are combined into 5-units in r13 syllabus.Click here to check all the JNTU Syllabus books. Microwave engineering Notes – MWE Pdf Notes – MWE Notes

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