O.2.8 Quality of quiet zone measurement uncertainty for EIRP/EIS

38.521-23GPPNRPart 2: Range 2 StandaloneRadio transmission and receptionRelease 17TSUser Equipment (UE) conformance specification

The MU for the quality of the quiet zone for EIRP/EIS includes the additional MU element of the directivity of the DUT and measurement antennas as shown in Figure O.2.9-1. The EIRP/EIS measurements are taking the peak gains of the respective antennas into account with the reference AUT placed in the centre of the quiet zone. Once the antenna is displaced in directions other than the measurement antenna, the direct line-of-sight link is taking reduced antenna gains into account. The type of reference AUT should therefore have similar pattern properties as typical UE antennas. For systems with very large range lengths, the directivity MU will be insignificant.

The combined MU element related to the quality of the quiet zone for EIRP/EIS, offset between UE antenna array and centre of quiet zone, and directivity is the standard deviation of the single-point gain measurement results that are based on the 7 different reference AUT positions, the respective reference AUT orientations, and the two reference AUT polarization orientations.

Figure O.2.9-1: Illustration of the Directivity MU Element