Experimental validation of automotive OTA measurements at close distance

Given the advancement of technologies related to automotive communications, working groups have been formed to define the methodologies for Automotive Over the Air (OTA) Measurements. The 5GAA test plan [1] defines two methods for OTA radiated power and sensitivity measurements, Direct-OTA and Combinational Method. In this paper the OTA measurement results performed on a full vehicle at near field distances are reported. The results are presented using the metrics which are relevant to automotive technologies. Direct-OTA results and estimated Baseline far field results are compared. The feasibility of measuring at a distance closer than far field is examined. Measurement time reduction for alternative measurement methodologies is evaluated.