Electromagnetic Waves in Lossy Medium

Flashcards covering key concepts related to electromagnetic waves, specifically in lossy media.

Lossy Medium

A medium that dissipates energy as electromagnetic waves propagate through it.

Power Density (Pdiss)

The amount of power dissipated per unit area in a medium.

Electric Field (E)

A vector field that represents the electric force per unit charge experienced by a point charge in the vicinity.

Intrinsic Impedance (η)

A measure of how much electric field (E) is generated by a magnetic field (H) in a given medium.

Skin Depth (δ)

The depth at which the amplitude of an electromagnetic wave falls to 1/e (about 37%) of its original value as it penetrates a conductive material.

Angular Frequency (ω)

The rate of change of phase of a sinusoidal waveform, typically measured in radians per second.

Phase Shift (φ)

The offset of a wave or oscillation, describing how far the wave has traveled relative to a reference point.

Magnetic Field (H)

A vector field that describes the magnetic influence on electric charges, currents, and magnetic materials.

Time Averaged Power Density (S)

The average power transmitted per unit area in an electromagnetic wave.

Conductivity (σ)

A measure of a material's ability to conduct an electric current.

Phase Velocity (v_p)

The speed at which the phase of a wave propagates in space.

Wave Number (k)

The spatial frequency of a wave, related to the wavelength.

Poynting Vector (S)

A vector that represents the directional energy flux (the rate of energy transfer per unit area) of an electromagnetic field.