Near-field H to E transformation using plane wave spectrum theory

Near-field measurements are widely used to indicate the radiation from integrated circuits (IC). To minimize the number of field components measured in a near-field scan, it is necessary to calculate the electric field from magnetic field or vice versa. In this paper, a method based on plane wave spectrum theory is proposed to perform the H to E transformation, and a filtering technique is proposed to address the noise problem in the calculation. A simple active circuit in a 3-D full-wave simulation tool is used to validate this method. This method is useful to reduce the number of field components to be measured, resulting in faster near-field scanning.