Reddit mentions of Card King KW-3016N Long Range Indoor Outdoor USB Wifi Wireless Adapter with 20dBi High Gain Antenna Extension Cable 300Mbps

Is the distance between the two positions free of obstructions?

If so a pair of UBNT LocoM5s would probably do. If you are uncertain there is a link simulator that you can use to plan things out.

If not something like this may work. After that its a matter of buying component antennas (Yagi or Parabolic dish) and hooking it up to whatever wifi you have at hand.

Congrats on your mod!

Did you consider using a USB wifi adapter?
You got me interested in long range wifi adapters. Found a 20db gain antenna/adaptor for $36.

I wonder how much more range this large, unstealthy one would get you.



(I am used to USB wifi, because back in the day when I had a broadcom internal nic, I opted for a compatible USB wifi dongle, which instantly fixed my issue.)

Might be a good opportunity to build and test a DIY high gain directional antenna like a cantenna or yagi. Lots of geek cred and also one of the least expensive options. You can do this on both ends, effectively making a wifi tunnel:

Cantenna: http://www.wikihow.com/Make-a-Cantenna

Super Antenna: http://www.instructables.com/id/10--WIFI-16dBi-Super-Antenna-Pictorial/

Yagi Antenna: https://www.amazon.com/Blackzebra-External-Wireless-Extender-Directional/dp/B00KL6X9M4/

20 dBi Antenna: https://www.amazon.com/KW-3016N-Outdoor-Wireless-Adapter-Antenna/dp/B019Z28CE4/

Another option is high powered (400-2000mW) wifi adapters. Alfa, Ubiquiti, Amped, ASUS, and other companies make them:

Alfa 2000mW adapter (I own this): https://www.amazon.com/High-Gain-Long-Rang-Alfa-9dBi-Mount/dp/B0038Q4AIG/

Amped High-power PCIE adapter: https://www.amazon.com/Amped-Wireless-PCI20E-AC1200-Adapter/dp/B00I9AS1JA/

The best paid option in my opinion is a pair of Nanostations from Ubiquiti setup in bridge mode

Edit: I think you are looking for an inexpensive option, so I would check out the DIY options above