As with a few of us, I also broke the Wifi antenna (despite of following instruction and being careful) while doing the broken digitizer replacement. I ordered a new WiFi Antenna. But the one I got is a little different and does not have the flat PCB with a flex wire, but instead have a think black plastic casing. I don't think it is the right part. Searching online this does come up as a replacement ipad2 antenna. To see an example see : http://www.sourcingcat.com/product_info.php?language=en¤cy=USD&products_id=2081
Is this the right antenna? If not, what is this one used for, and where on the ipad2 will it fit?