Inhalt | | Overview: Radiation mechanism, types of antennas, components of a communication system.
Propagation of electromagnetic waves: Free-space propagation, path loss, reflection, refraction, ground effects, ground waves, multipath propagation, diffraction, scattering, absorption, propagation models for Macro-, Micro-, and Pico-cells.
Fundamental antenna parameters: Near field, far field, radiation pattern, power density, power intensity, directivity, gain, antenna efficiency, input impedance, bandwith, polarization.
Theoretical foundation: Vector potentials, inhomogeneous vector potential wave equation, duality theorem, reciprocity theorem.
Wire antennas: Infinitesimal dipole, small dipoles, finite-length dipoles, monopoles, loop antennas.
Aperture and horn antennas: Field equivalence principle, rectangular and circular apertures, Babinet's principle, slot antennas, sectoral horn antennas, pyramidal horns, corrugated horns.
Microstrip antennas: Rectangular and circular patches, transmission line model, cavitiy model, Q-factor, bandwith, feeding mechanisms, input impedance, polarization.
Antenna arrays: Two-element array, N-element linear array, planar arrays, phased arrays, pattern synthesis. | |
