Radio Electronics for Amateur Radio Operators - Antennas and Propagation: From Atoms to Antennas™ by Terry L Barlet N0TLB

Master the science of antennas and radio wave propagation with Volume 4 of the Radio Electronics Course for Amateur Radio Operators — the most comprehensive electronics training series written specifically for the amateur radio community. Antennas are the one component that separates a good station from a great one. No matter how capable your transceiver, no matter how carefully you have built your shack, the antenna is where your signal meets the world. Volume 4 takes you deep into the theory and practice of antennas and propagation, building on the foundation established in Volumes 1 through 3 and giving you the knowledge to make informed decisions about every antenna you build, buy, or troubleshoot. This volume opens with antenna fundamentals — what an antenna actually does, how it converts electrical energy into electromagnetic waves, and why antenna length, feedpoint impedance, and radiation patterns matter. You will learn how the half-wave dipole works from first principles, why it remains the benchmark against which every other antenna design is measured, and how its behavior changes when you move it closer to or further from the ground. From the dipole, the course expands outward into the full range of antenna types used in amateur radio. Vertical antennas, ground plane requirements, and radial systems are covered in depth. You will learn how beam antennas — Yagi, quad, and log periodic designs — achieve directional gain, how to read and interpret antenna radiation patterns, and what front-to-back ratio means for real-world operating. Magnetic loop antennas, portable and emergency antennas, and multiband designs each receive dedicated treatment with practical guidance alongside the theory. Read more