Hack Wireless Card

Hacking a wireless card to fit an antenna is a similar job for every card. Some are easier than others. This document aims to show the basics, and help you to hack cards that may not be documented.

Wireless cards without an external antenna connection always have an internal antenna. Often, this is a PCB with specially shaped tracks. To fit an external antenna, you need to replace this internal device with a jack or a cable.

The first part of this is to kiss your warranty goodbye and open the case to get a look at the internal antenna. Often, the best way is to trim round the edges with a dremel-like tool until the plastic cracks off.

You should have a good view of the internal antenna now. If you're lucky, there will be a conveniently placed space for a PCB-mount connector. If so, make good use of it! If not, you'll have to work out the best place to solder on a cable. Remember that the outer conductor in the cable is a shield, so try to connect that all around the centre connector if possible. I'll sort out a picture to describe this.

Once you've connected a socket, it's time to remove the old antennas, as they will change the characteristics of your new antenna. I find the best way is to simply cut the track supplying the signal to the internal antenna. Your card is now ready to use.

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