# Electromagnetic Field Theory EC Syllabus for NIT Jalandhar

PH-207 Electromagnetic Field Theory [3 1 0 4]

Electrostatic Fields: Divergence Theorem, Poisson’s and Laplace’s equation in various co-ordinate systems, solution of single dimensional Laplaces equation, Conditions at a boundary between dielectrics, Electrostatic uniqueness theorem, capacitance, Calculation of capacitance for simple rectangular, Cylindrical and spherical geometries. Effect of multi-layer dielectrics, Energy and Mechanical forces in electric fields, Method of Electrical images for a point charge in the neighborhood of infinite conducting plane, Application of image method for transmission line capacitance calculations.

Magnetic Fields: Ampere’s work law in differential vector form, Ampere’s law for a current element. Magnetic vector Potential, Magnetic scaler Potential, Magnetic dipole, Energy and Mechanical forces in magnetic fields, Image of current carrying conductor in the neighborhood of a magnetic plane.

Maxwell’s Equations: Equation of continuity for time varying fields. Inconsistency of Amperes law,

Maxwell’s equations and their physical interpretation, Conditions at a boundary surface.

Electromagnetic Waves: TEM, Derivation of the wave equation and their general solution. Plane waves in unbounded media, Reflection and refraction of plane waves at surface interface, surface impedance, Penetration of Flux and Current in a conductor, Transmission line analogy.

Poynting Vector and Flow of Power: Poynting’s theorem, Interpretation of (E x H) – vector, Instantaneous, Average and complex Poynting Vector, Power Loss in a plane conductor.

Guided Waves and Wave Guides: Characteristics of TE and TM waves, wave impedance, transmission line theory, impedance matching by means of stab lines, TE and TM waves in circular guides, Introduction to wave guides, Circuits, line and guides – a comparison, Rectangular and circular wave guides, TE and TM waves in rectangular wave guides, Impossibility of TEM waves in wave guides, Wave impedances and characteristics impedances, Transmission line analogy for wave guides, Attenuation and Q-factor of wave guides, Dielectric slab wave guides.

Antenna Fundamentals: Directional properties of Dipole antennas, SW-antennas, Antenna gain, effective area, antenna terminal impedance, transmission loss between antennas, antenna temperature and S to N ratio, concept of space communication.

Books Recommended

1. Jordon E C and Balmain K G, “Electromagnetic waves and Radiating System”, second edition,

Prentice Hall New Delhi (1993).

2. Carter G W, “The Electromagnetic Fields in its Engineering aspects”, Longmans, Green and Co.

London, (1954)

3. Hayt W H, “Engineering Electromagnetics”, McGraw Hill Book Co, second Edition, NY (1967)

4. Wazed Miah M A, “Fundamentals of Electromagnetics”, Tata McGraw-Hill, New Delhi, (1982).