A Study of Electric-Field Measurement Disturbances Brought by Probe Supports

Abstract : This paper deals with interferences induced by some supports/masts on electric field measurements performed by an electric field probe. These interferences may be due to the geometry of the support or the intrinsic material it is made of. In a reverberation chamber, a mast may lower the chamber Q-factor if it absorbs a fraction of energy. This is a well-known fact. However, a non-dissipative support may also locally (at the probe location) disturb the field due to its scattering properties. This paper discusses the choice of an appropriate mast for an isotropic probe in the context of reverberation chamber measurements. These absorption / scattering features are evaluated and tentatively correlated with disturbances of electric field measurements observed through a specific measurement setup in an anechoic chamber.