March 11, 2010

EC1403MICROWAVE ENGINEERING


ANNA UNIVERSITY CHENNAI :: CHENNAI 600 025
CURRICULUM 2004
B.E. ELECTRONICS AND COMMUNICATION ENGINEERING

EC1403MICROWAVE ENGINEERING

Aim
To enable the student to become familiar with active & passive microwave devices & components used in Microwave communication systems.

Objectives

  • To study passive microwave components and their S- Parameters.
  • To study Microwave semiconductor devices & applications.
  • To study Microwave sources and amplifiers.

UNIT I 9
Microwave Frequencies, Microwave Devices, Microwave Systems, Microwave Units of Measure, Microwave Hybrid Circuits, Waveguide Tees, Magic Tees (Hybrid Trees), Hybrid Rings (Rat-Race Circuits), Waveguide Corners, Bends and Twists, Directional Couplers, Two-Hole Directional Couplers, Z & ABCD Parameters- Introduction to S parameters, S Matrix of a Directional Coupler, Hybrid Couplers, Circulators and Isolators, Microwave Circulators, Microwave Isolators.

UNIT II 9
Transit time limitations in transistors, Microwave bipolar transistors, power frequency limitations microwave field effect transistors, HEMT, Gunn effect – RWH theory, high – field domain and modes of operation microwave amplification – Avalance transit time devices – IMPATT and TRAPATT diodes and comparison parametric amplifiers.

UNIT III TRANSFERRED ELECTRON DEVICES (TEDs) and AVALANCHE TRANSIT-TIME DEVICES 9
Introduction, Gunn-Effect Diodes – GaAs Diode, Background, Gunn Effect, Ridely-Watkins-Hilsun (RWH) Theory, Differential Negative Resistance, Two-Valley Model Theory, High-Field Domain, Modes of Operation, LSA Diodes, InP Diodes, CdTe Diodes, Microwave Generation and Amplification, Microwave Generation, Microwave Amplification, AVALANCHE TRANSIT-TIME DEVICES, Introduction, Read Diode, Physical Description, Avalanche Multiplication, Carrier Current Io(t) and External Current I­e­(t), Output Power and Quality Factor, IMPATT Diodes, Physical Structures, Negative Resistance, Power Output and Efficiency, TRAPATT Diodes, Physical Structures, Principles of Operation, Power Output and Efficiency, BARITT Diodes, Physical Description, Principles of Operation, Microwave Performance, Parametric Devices, Physical Structures, Nonlinear Reactance and Manley – Rowe Power Relations, Parametric Amplifiers, Applications.

UNIT III MICROWAVE LINEAR-BEAM TUBES (O TYPE) and MICROWAVE CROSSED-FIELD TUBES (M TYPE) 9
Klystrons, Reentrant Cavities, Velocity-Modulation Process, Bunching Process, Output Power and Beam Loading, State of the Art, Multicavity Klystron Amplifiers, Beam-Current Density, Output Current Output Power of Two-Cavity Klystron, Output Power of Four-Cavity Klystron, Reflex Klystrons, Velocity Modulation, Power Output and Efficiency, Electronic Admittance, Helix Traveling-Wave Tubes (TWTs), Slow-Wave structures, Amplification Process, Convection Current, Axial Electric Field, Wave Modes, Gain Consideration, MICROWAVE CROSSED-FIELD TUBES , Magnetron Oscillators, Cylindrical Magnetron, Coaxial Magnetron, Tunable Magnetron, Ricke diagram.

UNIT IV STRIP LINES and MONOLITHIC MICROWAVE INTEGRATED CIRCUITS
9
Introduction, Microstrip Lines, Characteristic Impedance of Microstrip Lines, Losses in Microstrip Lines, Quality Factor Q of Microstrip Lines, Parallel Strip Lines, Distributed Lines, Characteristic Impedance, Attenuation Losses, Coplanar Strip Lines, Shielded Strip Lines, References, Problems, MONOLITHIC MICROWAVE INTEGRATED CIRCUITS, Introduction, Materials, Substrate Materials, Conductor Materials, Dielectric Materials, Resistive Materials, Monolithic Microwave Integrated-Circuit Growth, MMIC Fabrication Techniques, Fabrication Example.

UNIT V MICROWAVE MEASUREMENTS: 9
Slotted line VSWR measurement, VSWR through return loss measurements, power measurement, impedance measurement insertion loss and attenuation measurements- measurement of scattering parameters – Measurement of 1 dB, dielectric constant measurement of a solid using waveguide

TOTAL : 45
TEXT BOOKS

  • Samuel Y.LIAO : Microwave Devices and Circuits – Prentice Hall of India – 3rd Edition (2003)
  • Annapurna Das and Sisir K.Das: Microwave Engineering – Tata McGraw-Hill (2000) (UNIT V)

References

    • R.E. Collin : Foundations for Microwave Engg. – IEEE Press Second Edition (2002)
    • David M.POZAR : Microwave Engg. – John Wiley & Sons – 2nd Edition (2003)
    • P.A.RIZZI – Microwave Engg. (Passive ckts) – PH1

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