Evolution of RF safety standards and their impact on mobile and portable transmitters

Exposure standards currently recommended by international health organizations and under consideration by U.S. Governmental Agencies restrict the occupational exposure to 500 µW/cm
²
and the environmental (general public) limit to 200 µW/cm
²
in the band of land mobile frequencies. This paper discusses the options open to the manufacturers and the designers of mobile and personal transmitters in this rapidly changing regulatory scenario.