5EC5 MICROWAVE ENGINEERING-I

UNIT 1 : WAVE GUIDES :

Introduction of Microwaves and their applications. Rectangular Waveguides ,

Solution of Wave equation in TE and TM modes.  Power transmission and Power losses. Excitation of

modes in Rectangular waveguides, circular waveguides : Basic idea of TE and TM modes, field patterns,

TEM mode of propagation.

UNIT 2

:

WAVEGUIDE COMPONENTS

: Scattering matrix representation of networks.

Rectangular cavity

and circular cavity resonators. Waveguide Tees, Magic Tees. Hybrid rings. Waveguide corners, Bends

and twists.  Directional couplers, Circulators and isolators.

UNIT 3

:

KLYSTRONS :

Limitation of conventional vacuum tubes, Construction and operation of two

cavity & multicavity klystrons. Velocity modulation and electron bunching (analytical treatment), Applegate

diagram and applications of two cavity klystrons.

Construction, working and operation of Reflex klystron. Applications and practical considerations. Velocity

modulation, power output and frequency characteristics of a Reflex klystron. Electron admittance.

UNIT 4 : TRAVELLING WAVE TUBES (TWT):

Construction, operation and practical consideration of

helix type TWT.  Introduction to CW power, pulsed dual mode TWT. Coupled cavity TWT. Applications of

TWT.

UNIT 5 : MAGNETRON :

Types of Magnetron. Construction, operation, analysis and practical

consideration of cavity or travelling wave magnetron.  Introduction to coaxial, frequency angle and voltage

tunable magnetrons. Backward cross field oscillator, Forward wave cross field amplifier.