With the advent of 5G millimeter-wave (mmWave) devices of various sizes and applications, each requiring different architectures and sizes of mmWave antennas, it’s critical for test engineers to understand the differences in over-the-air (OTA) test chambers and test techniques. Direct far field (DFF) and compact antenna test range (CATR) are two types of OTA test methods supported by the 3GPP TR 38.810 Study on Test Methods for 5G FR2 (mmWave bands) devices.
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