Electromagnetic field measurement using circular wire scatterers

A method of simultaneously measuring electric and magnetic fields using a loop antenna has been developed and widely applied to EMC measurements. However, attached circuits, such as baluns, are necessary for the loop antenna. In the present paper, a method to measure electric and magnetic fields using a set of simple circular scatterers is proposed. By expanding the current on a circular scatterer and the incident field into Fourier series, theoretical equations containing the electric and magnetic-field effects on the port voltage are obtained. To validate the proposed method, a TEM cell is employed to generate electromagnetic fields, and the responses of the circular wires are measured.