Using of LPDA Antenna for UFA Evaluation in Radiated Immunity Test

This article presents a fast method to evaluate the immunity test’s Uniform Test Area (UFA) points in the 1 –6 GHz frequency range. The proposed method uses an antenna as a sensor instead of a common E-field probe to check the UFA. This method has proved its ability to quickly determine the possibility of using this transmitting antenna during an immunity test by evaluating the maximum difference level between the UFA points in both E and H-directions. The electric and magnetic field intensities have been measured by orienting the printed log periodic dipole array (PLPDA) antenna vertically and horizontally. Moreover, this method was applied on a stacked antenna operating from 0.8 GHz to 6 GHz to show its validity as a reference antenna for the immunity test.