Question: In conformance testing for UE/MS Over The Air (OTA) antenna performance, what is the primary purpose of using a laptop ground plane phantom for plug-in DUTs like USB dongles?
Option 1: To simulate the effects of user hand grip on antenna performance.
Option 2: To assess the DUT's performance in close proximity to the human head.
Option 3: To reproduce the effects of a laptop's ground plane on the DUT's antenna while minimizing measurement variability.
Option 4: To evaluate the DUT's ability to operate in free space environments.
Explanation: The correct answer, Option 3, highlights the laptop ground plane phantom's objective as specified in the context of conformance testing for UE/MS OTA antenna performance. This setup is designed to mimic the electrical environment (ground plane effects) of a real laptop for plug-in devices like USB dongles, which are typically used away from the user's head, thereby ensuring consistent and reliable measurement conditions without the variability introduced by actual laptops.