VOLTAGE RESPONSE AND FIELD RECONSTRUCTION FOR A MINIATURE FIELD PROBE IN A SPATIALLY NONUNIFORM ELECTRIC-FIELD

A miniature E-field probe employing a 0.6-mm linear dipole antenna has been developed at the University of Virginia. This paper describes an analytical study of the miniature field probe’s response to a spatially varying electric field. Based on the Nyquist sampling theorem, the spatial sampling frequency at which an electric field should be measured for good reconstruction is established. In addition, using antenna theory, the voltage response of the probe is found in terms of the antenna’s transmitting current and the measured electric field. Based upon this relationship, reconstruction of the electric field from a set of discrete voltage responses is studied. A method of moments program has been developed to determine numerically the voltage response of the antenna structure to a spatially varying electric field. Numerical results are presented, which allow for the testing of certain theoretical findings important for analyzing measurement data. Although developed for only one-dimensional fields, the methodology presented can be applied to general three-dimensional fields. © 1990 IEEE