EC2305 TRANSMISSION LINES AND WAVEGUIDES
AIM
To lay a strong foundation on the theory of transmission lines and wave guides by highlighting their applications.
OBJECTIVES
To become familiar with propagation of signals through lines
Understand signal propagation at Radio frequencies
Understand radio propagation in guided systems
To become familiar with resonators
UNIT I FILTERS
The neper - the decibel - Characteristic impedance of Symmetrical Networks – Current and voltage ratios - Propogation constant, - Properties of Symmetrical Networks – Filter fundamentals – Pass and Stop bands. Behaviour of the Characteristic impedance. Constant K Filters - Low pass, High pass band, pass band elimination filters - m - derived sections – Filter circuit design – Filter performance – Crystal Filters.
UNIT II TRANSMISSION LINE PARAMETERS
A line of cascaded T sections - Transmission lines - General Solution, Physical
Significance of the equations, the infinite line, wavelength, velocity, propagation, Distortion line, the telephone cable, Reflection on a line not terminated in Zo, Reflection Coefficient, Open and short circuited lines, Insertion loss.
UNIT III THE LINE AT RADIO FREQUENCY
Parameters of open wire line and Coaxial cable at RF – Line constants for dissipation -voltages and currents on the dissipation less line - standing waves – nodes – standing wave ratio - input impedance of open and short circuited lines - power and impedance measurement on lines – / 4 line, Impedance matching – single and double-stub matching circle diagram, smith chart and its applications – Problem solving using Smith chart.
UNIT IV GUIDED WAVES BETWEEN PARALLEL PLANES
Application of the restrictions to Maxwell’s equations – transmission of TM waves between Parallel plans – Transmission of TE waves between Parallel planes. Transmission of TEM waves between Parallel planes – Manner of wave travel. Velocities of the waves – characteristic impedance - Attenuators
UNIT V WAVEGUIDES
Application of Maxwell’s equations to the rectangular waveguide. TM waves in
Rectangular guide. TE waves in Rectangular waveguide – Cylindrical waveguides. The TEM wave in coaxial lines. Excitation of wave guides. Guide termination and resonant
cavities.
TEXT BOOK
1. John D.Ryder, "Networks, lines and fields", Prentice Hall of India, 2nd Edition, 2006.
REFERENCES
1. E.C.Jordan, K.G. Balmain: “E.M.Waves & Radiating Systems”, Pearson Education,2006.
2. Joseph Edminister, Schaum’s Series, Electromegnetics, TMH, 2007.
3. G S N Raju, Electromagnetic Field Theory and Transmission Lines, Pearson