Probes Correction for Antennas Near Field Measurement

Abstract

The probe is one of the major components building an indoor system for antenna near field measurement. This device allows to collect the distribution of the field radiated by the antenna under test (AUT), and to transform it into available voltage at its output. Thus, because of the response of the probe to other components of the field radiated by the AUT, to the influence of the geometric parameters of this one and to the problems related to the measuring surface. An unwanted error appear between the voltage and the field, and a step of post-processing is therefore necessary to correct this one. In this paper we address the problem for the correction by the technique of the deconvolution, a probe based on an Open Ended Rectangular WaveGuide (OERWG) is used to validate this approach. Thus, the spatial response of the probe is calculated in module and validated by three AUT, an open ridges rectangular waveguide, an open circular waveguide and a dipole antenna. The results obtained show that the calculated reference field and the reconstructed one are confused for the three antennas under test.