I recently purchased a netbook and I'm working on adding an external antenna for the wireless card. My problem is that I don't want to completely eliminate the internal antenna. Normally I'd just take an SPDT switch and call it a day.
However, upon tear-down of the computer I found that there are two separate antennas on the stock card. I can't just hook them together on the SPDT, they need to have seperate poles. I'm not sure of the correct switch to use here.
I need one that will allow me to have two positions, one with both internal antennas having continuity, and then one with the single external antenna having continuity.
i would not recommend connecting your rf out to a switch at all other than a proper rf switch. you will loose considerable power and cause interference.
You are working with 2.4GHz, which requires specialized wire and switches for that frequency. A normal SPDT switch would work very poorly, if at all, for that. Unless you have an external antenna especially designed for your card, I would not mess with it. Chances are, anything you do otherwise will make the reception worse than the original, built-in antennas.