This message was posted on behalf of Intel Corporation
Thanks for posting in our communities. We understand that you're looking for the antenna specification for Intel® Wireless-AC 9260.
This kind of information is shared directly with Original Equipment Manufacturers for them to integrate the product in their systems. We recommend you search online for Intel M.2 Wireless Adapter Antennas.
If you're looking to add wireless connectivity to your desktop systems, we suggest the Intel® Dual Band Wireless-AC 8265 Desktop Kit. This product comes with the required antennas.