Антенны. Распространение радиоволн. Ионосфера

Continuing the theme of "Antennas." Radio wave propagation is complex and unpredictable. Its connection to idiots is obvious, but unprovable. This is a serious film about radio wave propagation. I wanted to avoid the idiots, but it didn't work out that way. It has everything, almost everything: the ionosphere and its influence on the refraction and reflection of radio waves, diffraction, interference, and even Maxwell's equations. Even Maxwell's equations aren't at all scary; on the contrary, they're a real gem, not only for the mind, but also... The film discusses the influence of the ionosphere on radio waves of various ranges: long waves, short waves, ultrashort waves, etc. The information is useful not only for specialists calculating radio communication channels but also for radio amateurs. The theme of antennas continues, particularly the placement of antennas in space to achieve maximum communication range. A film description about radio wave propagation doesn't cover everything. Every minute of the film conceals something far from obvious. Watch until the end. You can support the channel on the crowdfunding platform: https://boosty.to/ensemb 00:00 Spreading 0:22 Boring 1:17 Looking at Maxwell 1:42 Obvious Things. Formulas 4:00 Spreading in a Straight Line and a Round Earth 5:25 Why Not in a Straight Line? 6:09 Wavebands 8:43 Atmospheric Layers 10:34 Characteristics of Ionospheric Layers 12:25 Sporadic E Layer 13:23 F2 Layer 13:59 Communication via Reflections 14:38 Wave Diffraction 15:47 Building Communication Channels at Ultra-High Frequencies 16:53 A Non-Obvious Thing Support the channel – https://boosty.to/ensemb or   / ensemb   #antenna #radio #electrodynamics #physics