Transmission Line Theory: Wave Propagation

This lecture covers the theory of transmission lines, including the derivation of telegrapher's equations, per-unit-length parameters, and frequency-domain solutions. It explores the behavior of lossless and lossy two-conductor lines, coaxial lines, and infinite lines excited by different sources. The lecture delves into the classical telegrapher's equations, complex propagation constants, characteristic impedance, and voltage reflection coefficients for finite lines. It also discusses impedance matching and the impact of reflection coefficients on line behavior.

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Related lectures (151)

Related concepts (73)

EE-575: Wave propagation along transmission lines

In this lecture, we will describe the theoretical models and computational methods for the analysis of wave propagation along transmission lines.

Transmission line

In electrical engineering, a transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner. The term applies when the conductors are long enough that the wave nature of the transmission must be taken into account. This applies especially to radio-frequency engineering because the short wavelengths mean that wave phenomena arise over very short distances (this can be as short as millimetres depending on frequency).

Wave

In physics, mathematics, engineering, and related fields, a wave is a propagating dynamic disturbance (change from equilibrium) of one or more quantities. Waves can be periodic, in which case those quantities oscillate repeatedly about an equilibrium (resting) value at some frequency. When the entire waveform moves in one direction, it is said to be a traveling wave; by contrast, a pair of superimposed periodic waves traveling in opposite directions makes a standing wave.

Overhead power line

An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy across long distances. It consists of one or more uninsulated electrical cables (commonly multiples of three for three-phase power) suspended by towers or poles. Since most of the insulation is provided by the surrounding air, overhead power lines are generally the least costly method of power transmission for large quantities of electric energy.

Transmission tower

A transmission tower, also known as an electricity pylon or simply a pylon in British English and as a hydro tower in Canadian English, is a tall structure, usually a steel lattice tower, used to support an overhead power line. In electrical grids, they are generally used to carry high-voltage transmission lines that transport bulk electric power from generating stations to electrical substations before reaching its end consumers; utility poles are used to support lower-voltage subtransmission and distribution lines that transport power from substations to electric customers.

Surface wave

In physics, a surface wave is a mechanical wave that propagates along the interface between differing media. A common example is gravity waves along the surface of liquids, such as ocean waves. Gravity waves can also occur within liquids, at the interface between two fluids with different densities. Elastic surface waves can travel along the surface of solids, such as Rayleigh or Love waves. Electromagnetic waves can also propagate as "surface waves" in that they can be guided along with a refractive index gradient or along an interface between two media having different dielectric constants.

Transmission Lines: Solutions and Equations EE-575: Wave propagation along transmission lines

Explores time-domain and frequency-domain solutions for transmission lines, including the Bergeron Method and input impedance.

Transmission Line Theory: Frequency Solutions EE-575: Wave propagation along transmission lines

Explores frequency solutions for transmission lines, including voltage reflection coefficients and the Blumer index.

Transmission Line Networks and Multiconductor Lines EE-575: Wave propagation along transmission lines

Explores transmission line networks and multiconductor lines, discussing wave propagation and complex network examples.

Multiconductor Transmission Lines EE-575: Wave propagation along transmission lines

Explores solutions and examples for multiconductor transmission lines, covering line parameters, wave propagation, inductance, capacitance matrices, and modal wave equations.

Telegrapher's Equations: Solutions and Examples EE-575: Wave propagation along transmission lines

Explores time-domain solutions for lossless lines and examples of wave propagation behavior.