Easily receive WIFI signals from far away using a standard USB WIFI adaptor and a bit of ingenuity. This Simple idea requires no modifications to a USB WIFI adaptor or your computer. A simple way to increase the signal strength and range of your WIFI. Plus it works with all USB WIFI adaptors.
http://www.instructables.com/id/EQARE4I72GEPUCHTHU/
I read on several websites, that some people managed to wire a SD Card (or a MMC) to a Fonera access point. After a little googling, I discover this can be done easily, so I decided to test.. but I run into one issue so I decided to describe the process here.
http://www.larsen-b.com/Article/262.html
For Linksys WAP11, SMC MC2655W and the Netgear ME102. In my testing I used a Linksys WAP 11. These same commands may or may not work with other brands.
http://www.unwiredadventures.com/unwire/2005/12/_increasing_rf_.html
In this tutorial, Seth Fogie illustrates how you can upgrade your WiFis wireless presence via the use of a bigger and more powerful external antenna.
http://www.informit.com/articles/article.asp?p=679395&seqNum=3&rl=1
Our goal is to use an exiting access point and without modifying the system build a wireless bridge that can make a one mile point to point link. We want to remain strictly legal and extend our range.
http://www.freeantennas.com/projects/outdoor_ap/index.html
This project gives you some ideas as how to easily setup an access point outside your home. Maybe you have a park across the way that you’d love to work at, but can not because you need to be connected. This project can surely make it possible.
http://www.mavromatic.com/archives/000451
Here is a shot at the result of a hot WiFi signal. The board contains 2.4GHz antenna printed onto the circuit board, an RF logarithmic detector to generate RSSI, a PIC microcontroller and a bank of LEDs to display the signal strength.
http://smithstuff.net/gallery/WiFi-Meter
A Voltage Standing Wave Ratio (VSWR) meter useable at the 2.4GHz band is hard to find. The circuit on this page serves as a Voltage Standing Wave Ratio meter or VSWR meter for the VHF-UHF-SHF frequency range. This includes the Wifi (802.11b/g), 2m, 70cm and 13cm Radio Amateur bands.
http://pe2er.nl/wifiswr/index.htm
What can you use to test how effective your antennas are for 2.4 Ghz? Which antenna has the best gain or, how do you know that there is any 2.4Ghz RF transmitted? Here are the details on how to build a general purpose 2.4Ghz Radio Frequency Field Strength Meter.
http://www.mrx.com.au/wireless/TestGear2_4ghz.htm
The splitter constist of four quaterwave striplines connected at their ends and four terminals (input, ground, output1, output2) connected to the cornes of the square formed by the striplines. The impedance of the terminal leads is 50 Ohm to connect them directly to RF-connectors such as SMA.
http://df2ck.de/tech/splitter