So you want to improve your wireless speed outside? The TP-LINK WBS210 300Mbps outdoor wireless base station has you covered. It relies on TP-LINK Pharos MAXtream technology to improve throughput, capacity, and latency. It has selectable bandwidth of 5/10/20/40MHz.
The unit has AP router, AP client router, repeater, and other modes. Costs under $100 at this time.