I have a Dell Vostro with Broadcom unsupported chip, and bought a very tiny
usb wireless adapter - Belkin N150. It is identified in Linux as Realtek
RTL8188CE-VAU.
Here is how I installed it:
Install gcc and Linux kernel headers
sudo apt-get install build-essential
sudo apt-get install linux-headers-$(uname -r)
Grab the driver from Realtek home page:
http://www.realtek.com.tw/downloads/searchView.aspx?keyword=rtl8188
Double click on the archive to unpack, and change to the directory.
sudo ./install.sh
All done.
