(2.1 – 11 GHz)
This log periodic printed circuit board antenna gives great performance from 2100 – 11000 MHz. This range includes wireless networking at 2.4GHz (802.11b/g) and 5.8GHz (802.11a).
Here are dimensions of this antenna.
http://www.g0mrf.freeserve.co.uk/cband.htm
And a link to a site from were You can buy this only for 12$