4EC4 ELECTROMAGNETIC FIELD THEORY

UNIT 1 : INTRODUCTION :

Vector Relation in rectangular, cylindrical, spherical and general

curvilinear coordinate system. Concept and physical interpretation of gradient, Divergence and curl,

Green’s & Stoke’s theorems.

UNIT 2 : ELECTROSTATICS :

Electric field intensity & flux density. Electric field due to various

charge configurations. The potential functions and displacement vector. Gauss’s law. Poisson’s and

Laplace’s equation and their solution. Uniqueness theorem. Continuity equation. Capacitance and

electrostatics energy. Field determination by method of images. Boundary conditions. Field mapping

and concept of field cells.

UNIT 3 : MAGNETOSTATICS :

Magnetic field intensity, flux density & magnetization, Faraday’s Law,

Bio-Savart’s law, Ampere’s law, Magnetic scalar and vector potential, self & mutual inductance,

Energy stored in magnetic field, Boundary conditions, Analogy between electric and magnetic field,

Field maping and concept of field cells.

UNIT 4 : TIME VARYING FIELDS :

Displacement currents and equation of continuity. Maxwell’s

equations, Uniform plane wave in free space, dielectrics and conductors, skin effect sinusoidal time

variations, reflection & refraction of Uniform Plane Wave, standing wave ratio. Pointing vector and

power considerations.

UNIT 5: RADIATION,

EMI AND EMC :

Retarded Potentials and concepts of radiation, Radiation from

a small current element. Radiation resistance

:

Introduction to Electromagnetic Interference and

Electromagnetic compatibility, EMI coupling modes, Methods of eliminating interference, shielding,

grounding, conducted EMI, EMI testing: emission testing, susceptibility testing.