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- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_and_Applications_(Staelin)/10%3A_Antennas_and_Radiation/10.03%3A_Antenna_gain_effective_area_and_circuit_propertiesThis page covers the fundamentals of antenna directivity, gain, and impedance, focusing on short dipole antennas. It defines key relationships between gain, radiation resistance, and the effective are...This page covers the fundamentals of antenna directivity, gain, and impedance, focusing on short dipole antennas. It defines key relationships between gain, radiation resistance, and the effective area, employing Thevenin equivalents to analyze antenna circuits. The reciprocity principle is emphasized, detailing how transmitted power impacts received power across distances.
- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_and_Applications_(Staelin)/11%3A_Common_Antennas_and_Applications/11.01%3A_Aperture_antennas_and_diffractionThis page explores antennas and their interaction with radiation, focusing on aperture antennas and their diffraction patterns. It covers the derivation of radiated fields, the Fraunhofer approximatio...This page explores antennas and their interaction with radiation, focusing on aperture antennas and their diffraction patterns. It covers the derivation of radiated fields, the Fraunhofer approximation for far-field analysis, and the relationship between aperture illumination, gain, and angular resolution.
- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_and_Applications_(Staelin)/10%3A_Antennas_and_Radiation/10.02%3A_Short_dipole_antennasThis 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.
- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_and_Applications_(Staelin)/10%3A_Antennas_and_Radiation/10.04%3A_Antenna_arraysThis page discusses enhancements in dipole antenna arrays, including increased gain, beam steering, and simultaneous transmissions through configurations and effective area adjustments. It highlights ...This page discusses enhancements in dipole antenna arrays, including increased gain, beam steering, and simultaneous transmissions through configurations and effective area adjustments. It highlights the use of mirrors to improve short dipole antenna gain and analysis of uniform dipole arrays, focusing on element factors and phase variations affecting radiation patterns.
- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_and_Applications_(Staelin)/10%3A_Antennas_and_Radiation/10.01%3A_Radiation_from_charges_and_currentsThis page provides an overview of antenna interaction with electromagnetic waves and electric fields from static charges. It covers characteristics of antennas, computation of static electric potentia...This page provides an overview of antenna interaction with electromagnetic waves and electric fields from static charges. It covers characteristics of antennas, computation of static electric potential from charge distributions, and magnetic fields from static currents. The text delves into the derivation of Helmholtz equations from electromagnetic theory, discussing vector fields, their divergence, and the relation of potentials to source distributions.
- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_and_Applications_(Staelin)/13%3A_Acoustics/13.03%3A_Acoustic_radiation_and_antennasThis page discusses the emission of acoustic waves from vibrating surfaces, starting with point sources to craft desired radiation patterns through superposition. It explores the behavior of spherical...This page discusses the emission of acoustic waves from vibrating surfaces, starting with point sources to craft desired radiation patterns through superposition. It explores the behavior of spherically symmetric monopole radiators, including wave propagation and energy transmission efficiency.
- https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/01%3A_Preliminary_Concepts/1.05%3A_Amateur_Radio_Equipment_BasicsThis section describes the basic components of equipment used for two-way communication in Amateur Radio, including transceivers and repeaters.
