How do I turn on/off my wireless antenna?
Most laptops that have an internal wireless antenna have some mechanism to turn on or off your wireless antenna. External wireless adapters usually do not have a means to disable your antenna.
How to turn on/off Wireless Antenna in various Laptops
Dell - Switch on the side or press FN+F2
Hewlett-Packard - Press Antenna Button
IBM - Press FN+F5
Toshiba - Switch on the side