Response of a Short-Dipole Probe to a Nonuniform $E$ -Field of a TEM Cell

A transverse electromagnetic cell is often used as a standard field generator since the E-field strength can be predicted using a simple formula. However, the E-field of the cell varies with respect to the location, and the estimated E-field strength is valid only at the center of the cell. Accordingly, the probe size should be sufficiently small compared with the field variation to ignore the nonuniformity of the field. Although the nonuniformity of the incident field can be improved by using a large cell, the usable upper frequency becomes low. In this paper, probe responses to the nonuniform E-field of a cell are investigated by a sequentially combined numerical method. The proposed method is validated by the comparison of the calculated results with the measured ones.