Truncation Error Mitigation in Free-Space Automotive Partial Spherical Near Field Measurements



Antennas installed in modern cars are often highly integrated.

In such cases, the entire vehicle is contributing to the radiated field, in particular at lower frequencies such as VHF. The complete characterization of the full vehicle is thus typically required. For frequencies down to 70 MHz, a widely accepted and cost effective solution is a multi-probe spherical Near Field (NF) system in which the scanning area is truncated below the horizon to minimize system dimensions. In this contribution, the mitigation capabilities of two techniques are investigated by experiment for an automotive scenario for the first time.