From top to bottom, a comparison of the WWAN antennas in the GSM, CDMA, and Wi-Fi versions, respectively.

There is one more antenna in the CDMA version of the iPad 2, which is similar to the antenna configuration of the Verizon iPhone 4.

For additional information on why GSM and CDMA require different antenna geometry, check out our iPhone 4 Verizon teardown.

Obviously, the Wi-Fi version has no WWAN antenna and thus has no black plastic antenna window along the top edge of its case. Instead, it makes do with solid aluminum.