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Questions about RF propagation including measurements, beacons, modes (ionospheric, tropospheric, ground wave), etc.

3 votes
3 answers
1k views

Long range HF polarization

However in this article is specifically mentioned long range HF polarization: https://www.electronics-notes.com/articles/antennas-propagation/antenna-theory/polarisation-polarization.php …
Boppity Bop's user avatar
0 votes
4 answers
405 views

Send on-off radio signal 5,000km

technical solution for 5,000 km range with short on-off signal: what kind of wavelength can travel that far what kind of transmitter power is required Another question: I understand that such long propagation
Boppity Bop's user avatar
-1 votes
1 answer
874 views

Transmit data over HF signal 10,000km away [closed]

I would like to transmit trinary data (-1,0,+1) on 20-30m wave to be received 10,000km away. From Europe to US. My first thought was this: https://www.researchgate.net/figure/Burst-modulation-mode-f-B …
Boppity Bop's user avatar