Modern wireless technology can’t transmit energy and information with a good enough SNR, over 80km and over earth curve, in portable low cost devices with current regulations.
We propose a very different approach based on astronomy technology, where a laser emits light vertically, generates a luminous dot at high altitude (similar to astronomy’s guidestar) and this light is detected at very long distance. By modulating the luminosity of this guidestar, it is possible to transmit information. This technology works even if the sky is cloudy and in daylight.
There is no need to build any infrastructure network. Each cell in a field can access the base station even at 80km. The cost per field station is less than $9,000. Field stations can be moved at will.
More information here: base_station_for_deserts