I would like to build an antenna that will be used in a very remote area to improve our cell signals. We have access to the GSM 850 (824.2 - 849.0 Uplink | 869.2 - 894.0 Downlink). I need help in calculating the antenna length based on the frequency and need advice on the most effective design. What seems to make the most sense is to install this at our base camp atop a tall tree and perhaps run a wire down toward the cabins to allow all of us to gain some cell signal strength. Any suggestions, advice etc would be greatly appreciated. (If I had the funds to purchase an out of the box system I would, so if it's possible, I'd like to go with a DIY approach).