Antenna measurement using cylindrical coefficients modes(CMCs) in non-anechoic environnement

This paper presents Exponential Tapered slot antenna (ETSA) radiation pattern measurement in Non Anechoic Environment. It suggests a method based on CMC decomposition and modal filtering in order to get rid of perturbations. First Cylindrical Near-field to Far-field Transformation and calculation of CMC are described. Then a simulation on an ETSA and a Perfect Electric Conductor (PEC) obstacle is done. Simulation results are presented for a frequency of 2 GHz. Far-field pattern cut at theta=90° is presented. Comparison between the simulated radiation pattern of ETSA without obstacle and the one of ETSA with PEC after filtering is proposed. A good agreement between these two curves is observed.