Electromagnetic Fields 2016/2017

PROGRAM

1.Transmission lines.

The Lumped-Circuit theory.

Sinusoidal waves on the ideal lossless line.

Characteristic impedance. Power transmitted by a single wave.

Reflection and transmission.

Transmission lines with losses.

2.Transmission lines techniques.

Standing wave ratio.

Impedance.

The Smith chart.

Impedance matching techniques.

Practical transmission lines.

3.Fields and field operators.

Review of vector analysis.

Scalar and vector fields.

Line and surface integrals.

Differential operators: Gradient, Divergence, Curl, Laplacian.

4.The electrostatic field.

Source of the electrostatic field.

The source equation.

Gauss’ law. The electric displacement D vector. Ohm’s law.

Electrostatic energy and potential.

5.The magnetostatic field.

Origin of the magnetostatic field.

Magnetic flux density and magnetic flux.

Magnetic force.

The magnetostatic curl equation.

Stoke’s theorem and Ampere’s circuital law.

Boundary conditions.

6. Time varying fields.

Displacement current. The continuity equation.

Faraday’s law.

Boundary conditions for the tangential electric field.

Maxwell’s equations.

7. Electrodynamics.

Sinusoidal fields.

The skin effect.

Boundary conditions for good conductors.

Electromagnetic waves. The uniform plane wave.

The quasi-static approximation.

8.Plane waves.

Characteristics of plane waves. Polarization of plane waves.

Poynting’s theorem.

Reflection and transmission at normal incidence.

Reflection and transmission at oblique incidence.

Plane waves in lossy media.

9.Guided waves.

TEM waves in transmission lines.

Hollow metal waveguides. TE waves. The TE10 mode. Waveguide losses.

10. Radiation and antennas.

Sources of radiation.

The elementary dipole. Directivity and gain.

Long-wire antennas. Radiation resistance.

Aperture antennas.

Definition of effective area. Relation between directivity and effective area.

Material:

S.E. Schwarz, "Electromagnetics for Engineers", Oxford University Press;

Notes made available by the teacher.