Estimation of exposure zone boundary distances from far-field antenna characteristics for finite radius wire antenna arrays

A method of estimating the occupational and nonoccupational exposure zone boundaries of ill-defined multi-element wire antennas, utilizing only the antenna forward gain and half-power beamwidths in both principal far-field radiation planes has been presented. Upon choosing a suitable reference antenna with similar radiation characteristics to the original antenna to be examined, the near-field and exposure zones could be efficiently calculated using Huygen's wavelets technique for multi-element wire antennas. While not providing an exact solution, this algorithm does offer an efficient solution with high accuracy compared to NEC especially when only limited information of the antenna to be modelled is available.