|Originally posted by BlackBeard
Well it does appear that the card in the 5680 has two antennas coming out of it...but that doesn't prove that A) It's not just two ends of the same antenna...or B) That an 802.11a card can function upto spec with an antenna designed for 2.4ghz. But like I said, I'm only lightly familiar with wireless cards and antennas. I do know that my Cantenna wont work with an 802.11a card worth beans. Again, due to the diffrent wavelengths.
802.11a uses frequency bands starting at 5.15GHz. Because of the maths associated with antennas, an antenna tuned to the various bands used for 802.11b and g (listed in a previous post by me, but slightly above 2.4GHz), 802.11b/g antennas make very poor feeds for 802.11a signals.
Now, if a were a true multiple of the wavelengths used in b/g, they'd work a treat.
They aren't, so they don't.
Sure, you'll still pick up *something* if you use a b/g antenna with a. But you'd also pick up something if you just shoved coax of random length into the antenna socket, too.