Antennas

Foundation: Fiber Optic Cables Are, By Far, the Most Energy-Efficient Way To Transmit Data

Fiber Optic Cables Feed All Wireline &Wired Broadband and Telecommunications
Fiber Optic cables: How They Work

Antennas: Energy-Inefficient Transmission of Electromagnetic Power Through the Air

Wow . . . let’s appreciate how over 60 years, the physics has not changed,
but the presentation style certainly has . . . and presentation = education, marketing, indoctrination and, often, propaganda.

MCMLIX = 1959: Antenna Fundamentals 1 — Propagation
MCMLIX = 1959: Antenna Fundamentals 2 — Directivity

MCMLIX = 1959: Antenna Fundamentals 3 — Bandwidth
1894: Heinrich Hertz Dies at 36 — From Microwave Radiation Sickness
View source slides here

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60 years later in 2019 — How does an Antenna work?
60 years later in 2019 — Understanding Electromagnetic Radiation!

And Now . . . For Some Hand-Drawn Explanations from Doc Physics

2013: Accelerating Charges Emit Electromagnetic Waves
2013: Wave Interference