This page covers the radiation emitted by Hertzian dipoles, including the derivation of electromagnetic fields using Maxwell’s equations and the Biot-Savart law. It emphasizes the behavior of far-fiel...This page covers the radiation emitted by Hertzian dipoles, including the derivation of electromagnetic fields using Maxwell’s equations and the Biot-Savart law. It emphasizes the behavior of far-field and near-field radiation, detailing the donut-shaped radiation pattern and the conversion of electromagnetic waves to circuit voltages by antennas. The analysis includes θ-polarized plane waves, focusing on intensity and total power radiated, with dependencies on antenna efficiency and wavelength.
This page focuses on wire antennas, analyzing current distributions and radiated fields while addressing challenges in solving Maxwell's equations for complex designs. It discusses quasistatic approxi...This page focuses on wire antennas, analyzing current distributions and radiated fields while addressing challenges in solving Maxwell's equations for complex designs. It discusses quasistatic approximations, radiation resistance, and open-circuit voltage, emphasizing the half-wave dipole's properties. The text also covers nominal current distributions across various structures, their variation during cycles, and how arm lengths influence terminal currents and radiation resistance.