Uncertainty Analysis of Spherical Near Field Antenna Measurement System at VHF



This paper presents parts of investigations done in a VHF spherical Near-Field system in order to estimate measurement uncertainties.

First is briefly presented the monoprobe Near-Field system and uncertainties estimations challenges due to low frequencies. Then are described the specific and appropriated approaches for the considered errors terms. Classical pattern comparison is used. Finally is provided a global budget error with and without time filtering to appreciate the benefit of such an approach.