ECE-503 Electromagnetic Theory

Static Electric Field: Electric Flux, Gauss’s law, Application of Gauss’s law, Divergence, D. Divergence Theorem. Work done in moving a point charge in an electric field, potential difference and potential at a point. Potential gradient. Equipotential surface, Relation between potential and field, intensity, conservative property, Field of a dipole. Energy stored in an electric field, Energy density. The nature of electric materials, polarization and permitivity Boundary conditions. Capacitor and capacitance, Examples of calculation of capacitance-parallel plate capacitor, Coaxial cable, Single-phase transmission line.

Static Magnetic Field: Biot-Savart Law, Ampere’s circuital law, Cur of H.Strokes Theorem, Flux density and flux, Divergence of scalar and vector magnetic potentials, Derivation of magnetic field law. Force on a moving charge, Force on a differential current element, Force and torque on a closed loop. The nature of magnetic materials, Magnetization and permeability, Magnetic boundary conditions, potential energy and force on magnetic materials.Inductors and inductance, Mutual inductance, Examples of calculation of inductance.

Solution of Static Field Problems: Poisson and Laplaces equations, Field governed by Poisson’s and Laplaces equations. Simple examples.

Method of Images: Principle of method of images. Application to problems with simple boundaries.

Time-varying fields: Maxwell’s Equations: Faradays law, displacement current, Maxwell’s equation in differential form, Maxwell’s equation in integral form, and Maxwell’s equations for the time periodic case, Retarded potential, Boundary conditions for time varying fields.

Application of Maxwell’s Equation: Flow of power: Power flow in electromagnetic field, The poynting vector, Instantaneous, average and complex poynting vectors, power flow in coaxial cable, Skin effect.

electromagnetic Wave: The wave equation, Uniform plane wave in free space, Plane wave in perfect dielectric, plane waves in good conductors, plane waves in lossy dielectric, reflection of normally incident plane waveform a perfect conducting plane and from a perfect dielectric plane, standing wave ratio.

Wave Guides: Wave-guides, Mode in wave-guides, solution of TE10 & TM11 modes in rectangular wave-guides, methods of excitation of modes wave-guides.

Antenna: Definition of Antenna, basic parameters of Antenna. Principles of working of commercial Antenna ( Yagiuda, Parabolic).

TEXTBOOKS:

1. Engg. Electromagnetics by W.H. Hyat Jr.

2. Electromagnetics by J.D. Krus and K.R. Carver.

3. Fields and Waves in Communication Electronics by S. Ramo, J.R. Whinnery and T.V. Duzer.

4. Electromagnetic Waves and Radiating Systems by E.C. Jordan and K.G. Balsain.

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