I have a new Latitude D610 which came with a Centrino 802.11b/g card, but I upgraded it to a Intel Centrino 2915 a/b/g mini-PCI card and it works great.

I have another D600 that I would like to use with my 802.11a network.
What type of antenna comes with the D600 and can it use 802.11a's 5GHz or is it a 2.4GHz antenna only?
Is there any documentation on the integrated antenna?