Efficient Near-Field Techniques for Human Exposure Evaluation: Applications to Mobile and Fixed Antennas

• Main Author: Bolomey, J. Ch
• Format: Conference Proceeding
• Language: English
• DOI: 10.1109/ISEMC.2002.10792082

This paper addresses experimental techniques for electromagnetic(EM) dosimetry. EM dosimetry is an obliged step for compliance testing of both portable and fixed antennas, extensively used in mobile communications. The experimental procedures required by compliance testing are too time consuming for being routinely used for R&D assistance to antenna design or in antenna production testing. There is a strong demand for more flexible assessment techniques. Near-Field techniques are shown to provide efficient and innovative approaches for SAR assessment of portable phones, as well as for determining the security perimeter of base station antennas. Near-Field techniques for antenna measurements have been significantly developed these last years, both at equipment and algorithm levels. They allow to obtain a maximum information from a minimized number of measurement. Reducing the number of measurement contributes, of course, to reduce the duration of testing procedures. Furthermore, using probe arrays instead of single probe offers additional and spectacular reduction of the probing duration. The methods described in this paper are not exhaustive. They just show how Near-Field techniques can be efficiently used for dosimetric purposes and should contribute to demonstrate that they constitute good candidates for the next standard procedures.