Yagi antenna or cantena that are DIY, you buy it and just hook up wifi adapter and turn it into AP (access point), but they are more directional, its hard to do BTW, and if there are houses obstacles, its impossible even if a tree is there.
All well and good that your wireless AP has a strong transmit signal but what about the host machine transmitting back....... Maximum transmit power is a legal limitation, directional antennas will focus the energy NOT increase it. Understanding wifi/RF is an art form with many things to consider Fresnel zones, free space propagation, LOS, loss and gain!
considering performance of a wifi antenna is about 60 meters ~300 feet at best, if your using an external boosting +30db antenna.
500 meters is a long distance you will need repeating antennas along the way to grab and push the signal along the way to the final destination
(i.e. 1 Watt directional antenna mounted on the rooftop.. expensive solution. and requires permits depending where your located)
Unless you have to cover the whole area, a long lan cable would be viable. Otherwise shift towards several devices, something like a mesh network made out of repeaters.
Unless you have to cover the whole area, a long lan cable would be viable. Otherwise shift towards several devices, something like a mesh network made out of repeaters.
Good luck with that, might want to consider the power requirements along the way!!