5G millimeter wave (mmWave) devices operating above 24 GHz incorporate millimeter-sized patch antenna arrays or dipole antennas that become an integral part of the device module packaging. Testing these assemblies requires over-the-air tests inside a chamber. But, a mmWave test chamber can introduce significant path loss, more than from cables and connectors. Understanding how to calculate the total link budget for over-the-air testing is a critical step in 5G mmWave OTA test. To help engineers navigate the challenges of 5G OTA testing, LitePoint has put together this comprehensive guide to 5G OTA testing.