Introduction to Electromagnetic Fields

Ampère's law antenna average power axis backward-traveling waves boundary conditions capacitance Chap charge density charge distribution charge Q components conductivity consider constant contour current density cylindrical cylindrical coordinate system defined Determine dielectric dipole direction electric field electric flux electric flux density electromagnetic fields energy example Faraday's law field intensity field vectors FIGURE flux density free charge free space frequency Gauss given inductance input length line integral load loop lossless lossy magnetic field magnetic flux magnitude material Maxwell's equations medium mode obtain per-unit-length perfect conductor permittivity phasor point charge polarization potential Poynting vector propagation R₁ radius reflection coefficient region result scalar field shown in Fig Solution spherical coordinate system Substituting surface charge tangential time-varying transmission line uniform plane waves unit vector vector field velocity Vs(t waveguide wire zero ду дх