Computational Electromagnetics (CEM) solvers are important engineering tools for supporting the evaluation and optimization of antenna placement on larger complex platforms. Due to the conclusiveness and high reliability of actual measured data, antenna measurements are required for the final validation of most systems containing an antenna.
In classic probe-corrected spherical NF measurements, one of the main concerns is the probe , , . Standard NF-FF transformation software applies probe correction with the assumption that the probe pattern behaves with µ=±1 azimuthal dependence. In reality, any physically realizable probe is just an approximation to this ideal case.
Measurement applications in a Compact Antenna Test Range (CATR) often require low cross-polarization or high polarization purity of the Quiet Zone (QZ). This requirement is often the main motivation for choosing the more complex and thus expensive compensated dual reflector system as opposed to the simpler and cheaper single reflector system.
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.