Comment by burnt-resistor
10 hours ago
When I worked in the Trimble Navigation radio group, 2.4 GHz was tried but its real world range sucked compared to ~900 MHz and CB ~450 MHz bands of existing solutions. It's simply limitations of physics that lower frequencies propagate farther (at lower bandwidth) than higher frequencies.
even 900mhz sux vs 433. the lower the better it penetrates matter for the same amplitude.
lower than 430 you start to run into severe bandwidth issues though. and its not allowed to transmit lora/dss on 430 in the us without license hence the 900mhz
at 2.4ghz the real world usage is limited. might as well use wifi. the only advantage is short range bandwidh while keeping lora compat.