3 ms·

But dropping from 2.4Ghz and 5Ghz down to 900Mhz does significantly improve the penetration from varying forms of obstructions and makes tropospheric ducting mo

But dropping from 2.4Ghz and 5Ghz down to 900Mhz does significantly improve the penetration from varying forms of obstructions and makes tropospheric ducting more likely to occur.

superkuh 3y ago
In my experience it's not the houses or trees that block you. It's always changes in ground elevation, a small rise here or there. Using 902-928 MHz (actually a 5 Mhz channel centered around 906) did not increase my range versus 2.4 or 5 GHz options at the same height above terrain. And the fresnel zone of 900 MHz is much larger than 5 GHz so in it requires more height above terrain than 5 GHz. Not great. Tropospheric ducting is so transient and rare it does not matter for this application. And it doesn't really help getting your signal across town. I regret investing in a bunch of 900 MHz transceivers, bidirectional amps, filters, etc.